Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 build administrator password-reset links using the request Host header without validation, allowing unauthenticated attackers to redirect reset tokens to attacker-controlled domains. Attackers can request password resets for known administrator email addresses with forged Host headers to intercept valid reset tokens and take over administrator accounts.

Sylius versions before 1.12.25, 1.13.17, 1.14.20, 2.1.16, and 2.2.9 fail to include firewall identification in JWT tokens issued by separate Admin and Shop API endpoints. Attackers can register a shop customer account using an administrator's email address and obtain a token that the Admin API resolves to that administrator, granting full administrative access.

Sylius versions before 2.1.16 and 2.2.9 fail to restrict payment request actions in the Shop API endpoint, allowing customers to trigger refunds on completed orders. Attackers with order tokens can submit arbitrary payment actions like refunds that payment gateways execute while Sylius maintains order as paid, causing financial loss.

Sylius versions before 2.1.16 and 2.2.9 fail to validate payment amounts during cart recalculation, allowing unauthenticated attackers to modify order totals after gateway transaction initiation. Attackers can pay a small amount, enlarge the order after gateway capture, and have the system mark the inflated order as fully paid while the gateway captured only the original amount.

Affected versions of Sylius give attackers the ability to switch channels via the channelcode GET parameter in production environments. This was meant to be enabled only when kernel.debug is set to true. However, if no syliuschannel.debug is set explicitly in the configuration, the default value which is kernel.debug will be not resolved and cast to boolean, enabling this debug feature even if that parameter is set to false. Patch has been provided for Sylius 1.3.x and newer - 1.3.16, 1.4.12, 1.5.9, 1.6.5. Versions older than 1.3 are not covered by our security support anymore.

Impact Sylius API filters ProductPriceOrderFilter and TranslationOrderNameAndLocaleFilter pass user-supplied order direction values directly to Doctrine's orderBy() without validation. An attacker can inject arbitrary DQL:

GET /api/v2/shop/products?order[price]=ASC,%20variant.code%20DESC

Patches The issue is fixed in versions: 1.9.12, 1.10.16, 1.11.17, 1.12.23, 1.13.15, 1.14.18, 2.0.16, 2.1.12, 2.2.3 and above.

Workarounds

An EventSubscriber that sanitizes order query parameters only on API routes before they reach the vulnerable filters.

The subscriber accepts an $apiRoute constructor parameter (default /api/v2) and skips non-API requests entirely — so there is zero overhead on shop/admin page requests.

This follows the same pattern used by Sylius's own KernelRequestEventSubscriber (src/Sylius/Bundle/ApiBundle/EventSubscriber/KernelRequestEventSubscriber.php), which also uses strcontains($pathInfo, $this->apiRoute) to scope logic to API routes.

---

Step 1 — Create the EventSubscriber

src/EventSubscriber/SanitizeOrderDirectionSubscriber.php:

php <?php

declare(stricttypes=1);

namespace App\EventSubscriber;

use Symfony\Component\EventDispatcher\EventSubscriberInterface; use Symfony\Component\HttpKernel\Event\RequestEvent; use Symfony\Component\HttpKernel\KernelEvents;

final class SanitizeOrderDirectionSubscriber implements EventSubscriberInterface { private const ALLOWEDDIRECTIONS = ['asc', 'desc'];

public function construct( private string $apiRoute, ) { }

public static function getSubscribedEvents(): array { return [ KernelEvents::REQUEST => ['sanitizeOrderParameters', 64], ]; }

public function sanitizeOrderParameters(RequestEvent $event): void { if (!strcontains($event->getRequest()->getPathInfo(), $this->apiRoute)) { return; }

$request = $event->getRequest();

/ @var mixed $order / $order = $request->query->all()['order'] ?? null; if (!isarray($order)) { return; }

$needsSanitization = false; $sanitized = []; foreach ($order as $field => $direction) { if (isstring($direction) && inarray(strtolower($direction), self::ALLOWEDDIRECTIONS, true)) { $sanitized[$field] = $direction; } else { $needsSanitization = true; } }

if (!$needsSanitization) { return; }

$all = $request->query->all(); $all['order'] = $sanitized; $request->query->replace($all);

$request->server->set('QUERYSTRING', httpbuildquery($all)); $request->attributes->set('apifilters', $all); } }

Step 2 — Register the service

Option A — If your config/services.yaml already has App\ autowiring (Symfony default):

yaml Nothing to do — autoconfigure picks up EventSubscriberInterface automatically. Optionally bind the API route prefix: services: App\EventSubscriber\SanitizeOrderDirectionSubscriber: arguments: $apiRoute: '%sylius.security.newapiroute%'

Option B — If there is no App\ autowiring:

yaml services: App\EventSubscriber\SanitizeOrderDirectionSubscriber: arguments: $apiRoute: '%sylius.security.newapiroute%' tags: ['kernel.eventsubscriber']

Using %sylius.security.newapiroute% ties the subscriber to the same prefix Sylius uses (/api/v2 by default). If the parameter is not available, hardcode '/api/v2' instead.

Step 3 — Clear cache

bash bin/console cache:clear

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability: - Chris Alupului (@Neosprings) - Bartłomiej Nowiński (@bnBart)

For more information If you have any questions or comments about this advisory:

- Open an issue in Sylius issues - Email us at security@sylius.com

Impact A Time-of-Check To Time-of-Use (TOCTOU) race condition was discovered in the promotion usage limit enforcement. The same class of vulnerability affects three independent limits:

1. Promotion usage limit - the global used counter on Promotion entities 2. Coupon usage limit - the global used counter on PromotionCoupon entities 3. Coupon per-customer usage limit - the per-customer redemption count on PromotionCoupon entities

In all three cases, the eligibility check reads the used counter (or order count) from an in-memory Doctrine entity during validation, while the actual usage increment in OrderPromotionsUsageModifier happens later during order completion — with no database-level locking or atomic operations between the two phases.

Because Doctrine flushes an absolute value (SET used = 1) rather than an atomic increment (SET used = used + 1), and because the affected entities lack optimistic locking, concurrent requests all read the same stale usage counts and pass the eligibility checks simultaneously.

An attacker can exploit this by preparing multiple carts with the same limited-use promotion or coupon and firing simultaneous PATCH /api/v2/shop/orders/{token}/complete requests. All requests pass the usage limit checks and complete successfully, allowing a single-use promotion or coupon to be redeemed an arbitrary number of times. The per-customer limit can be bypassed in the same way by a single customer completing multiple orders concurrently. No authentication is required to exploit this vulnerability.

This may lead to direct financial loss through unlimited redemption of limited-use promotions and discount coupons.

Patches The issue is fixed in versions: 1.9.12, 1.10.16, 1.11.17, 1.12.23, 1.13.15, 1.14.18, 2.0.16, 2.1.12, 2.2.3 and above.

Workarounds

Decoration of the OrderPromotionsUsageModifier service to use atomic operations based on actual database-synchronized values.

The decorated service id in Sylius >=2.0 is sylius.modifier.promotion.orderusage, while <2.0 it's sylius.promotionusagemodifier; The following instruction uses the latter, but it needs to be changed depending on the Sylius version.

Step 1. Create the decorator service

src/Modifier/AtomicOrderPromotionsUsageModifier.php:

php <?php

declare(stricttypes=1);

namespace App\Modifier;

use Doctrine\DBAL\Connection; use Doctrine\ORM\OptimisticLockException; use Sylius\Component\Core\Model\OrderInterface; use Sylius\Component\Core\Model\PromotionCouponInterface; use Sylius\Component\Core\Promotion\Modifier\OrderPromotionsUsageModifierInterface; use Sylius\Component\Promotion\Model\PromotionInterface; // use Symfony\Component\DependencyInjection\Attribute\AsDecorator;

// #[AsDecorator(decorates: 'sylius.promotionusagemodifier')] final class AtomicOrderPromotionsUsageModifier implements OrderPromotionsUsageModifierInterface { / @var Connection / private $connection;

public function construct(Connection $connection) { $this->connection = $connection; }

public function increment(OrderInterface $order): void { foreach ($order->getPromotions() as $promotion) { $this->incrementPromotionUsage($promotion); }

/ @var PromotionCouponInterface|null $coupon / $coupon = $order->getPromotionCoupon(); if (null === $coupon) { return; }

$this->incrementCouponUsage($coupon, $order); }

public function decrement(OrderInterface $order): void { foreach ($order->getPromotions() as $promotion) { $this->decrementPromotionUsage($promotion); }

/ @var PromotionCouponInterface|null $coupon / $coupon = $order->getPromotionCoupon(); if (null === $coupon) { return; }

if (OrderInterface::STATECANCELLED === $order->getState() && !$coupon->isReusableFromCancelledOrders()) { return; }

$this->decrementCouponUsage($coupon); }

private function incrementPromotionUsage(PromotionInterface $promotion): void { $affected = $this->doExecuteStatement( 'UPDATE syliuspromotion SET used = used + 1 WHERE id = :id AND (usagelimit IS NULL OR used < usagelimit)', ['id' => $promotion->getId()] );

if (0 === $affected) { throw new OptimisticLockException(sprintf('Promotion "%s" is no longer applicable.', $promotion->getCode()), $promotion); }

$newUsed = (int) $this->doFetchOne( 'SELECT used FROM syliuspromotion WHERE id = :id', ['id' => $promotion->getId()] );

$promotion->setUsed($newUsed); }

private function decrementPromotionUsage(PromotionInterface $promotion): void { $this->doExecuteStatement( 'UPDATE syliuspromotion SET used = GREATEST(used - 1, 0) WHERE id = :id', ['id' => $promotion->getId()] );

$newUsed = (int) $this->doFetchOne( 'SELECT used FROM syliuspromotion WHERE id = :id', ['id' => $promotion->getId()] );

$promotion->setUsed($newUsed); }

private function incrementCouponUsage(PromotionCouponInterface $coupon, OrderInterface $order): void { $row = $this->doFetchAssociative( 'SELECT used, usagelimit, percustomerusagelimit FROM syliuspromotioncoupon WHERE id = :id FOR UPDATE', ['id' => $coupon->getId()] );

if (false === $row) { throw new OptimisticLockException(sprintf('Promotion coupon "%s" is no longer applicable.', $coupon->getCode()), $coupon); }

if (null !== $row['usagelimit'] && (int) $row['used'] >= (int) $row['usagelimit']) { throw new OptimisticLockException(sprintf('Promotion coupon "%s" is no longer applicable.', $coupon->getCode()), $coupon); }

if (null !== $row['percustomerusagelimit']) { $this->assertPerCustomerCouponUsageLimitNotReached( $coupon, $order, (int) $row['percustomerusagelimit'] ); }

$this->doExecuteStatement( 'UPDATE syliuspromotioncoupon SET used = used + 1 WHERE id = :id', ['id' => $coupon->getId()] );

$coupon->setUsed((int) $row['used'] + 1); }

private function assertPerCustomerCouponUsageLimitNotReached( PromotionCouponInterface $coupon, OrderInterface $order, int $perCustomerUsageLimit ): void { $customer = $order->getCustomer(); if (null === $customer || null === $customer->getId()) { return; }

$sql = 'SELECT o.id FROM syliusorder o WHERE o.customerid = :customerId AND o.promotioncouponid = :couponId AND o.state != :stateCart'; $params = [ 'customerId' => $customer->getId(), 'couponId' => $coupon->getId(), 'stateCart' => OrderInterface::STATECART, ];

if ($coupon->isReusableFromCancelledOrders()) { $sql .= ' AND o.state != :stateCancelled'; $params['stateCancelled'] = OrderInterface::STATECANCELLED; }

$sql .= ' FOR UPDATE';

$count = count($this->doFetchAllAssociative($sql, $params));

if ($count >= $perCustomerUsageLimit) { throw new OptimisticLockException(sprintf('Promotion coupon "%s" is no longer applicable.', $coupon->getCode()), $coupon); } }

private function decrementCouponUsage(PromotionCouponInterface $coupon): void { $this->doExecuteStatement( 'UPDATE syliuspromotioncoupon SET used = GREATEST(used - 1, 0) WHERE id = :id', ['id' => $coupon->getId()] );

$newUsed = (int) $this->doFetchOne( 'SELECT used FROM syliuspromotioncoupon WHERE id = :id', ['id' => $coupon->getId()] );

$coupon->setUsed($newUsed); }

/ @return int Number of affected rows / private function doExecuteStatement(string $sql, array $params): int { if (methodexists($this->connection, 'executeStatement')) { return $this->connection->executeStatement($sql, $params); }

return $this->connection->executeUpdate($sql, $params); }

/ @return mixed|false / private function doFetchOne(string $sql, array $params) { if (methodexists($this->connection, 'fetchOne')) { return $this->connection->fetchOne($sql, $params); }

return $this->connection->fetchColumn($sql, $params); }

/ @return array|false / private function doFetchAssociative(string $sql, array $params) { if (methodexists($this->connection, 'fetchAssociative')) { return $this->connection->fetchAssociative($sql, $params); }

return $this->connection->fetchAssoc($sql, $params); }

/ @return array[] / private function doFetchAllAssociative(string $sql, array $params): array { if (methodexists($this->connection, 'fetchAllAssociative')) { return $this->connection->fetchAllAssociative($sql, $params); }

return $this->connection->fetchAll($sql, $params); } }

Step 2. Register the service

Option A: If your app uses autowiring and supports the #[AsDecorator] attribute, uncomment it in the class and no further configuration is necessary.

Option B: Manually register the service in config/services.yaml:

yaml services: App\Modifier\AtomicOrderPromotionsUsageModifier: decorates: 'sylius.promotionusagemodifier' arguments: ['@doctrine.dbal.defaultconnection']

Step 3. Update exception mapping (optional)

Check if your apiplatform configuration maps OptimisticLockException to a code and update it if not: yaml apiplatform: ... exceptiontostatus: ... Doctrine\ORM\OptimisticLockException: 409

Step 4. Clear cache

bash bin/console cache:clear

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability: - Djibril Mounkoro (@whiteov3rflow) - Bartłomiej Nowiński (@bnBart)

For more information

If you have any questions or comments about this advisory:

- Open an issue in Sylius issues - Email us at security@sylius.com

Impact

An authenticated stored cross-site scripting (XSS) vulnerability exists in multiple places across the shop frontend and admin panel due to unsanitized entity names being rendered as raw HTML.

Shop breadcrumbs (shared/breadcrumbs.html.twig): The breadcrumbs macro uses the Twig |raw filter on label values. Since taxon names, product names, and ancestor names flow directly into these labels, a malicious taxon name like <img src=x onerror=alert('XSS')> is rendered and executed as JavaScript on the storefront.

Admin product taxon picker (ProductTaxonTreeController.js): The rowRenderer method interpolates ${name} directly into a template literal building HTML, allowing script injection through taxon names in the admin panel.

Admin autocomplete fields (Tom Select): Dropdown items and options render entity names as raw HTML without escaping, allowing XSS through any autocomplete field displaying entity names.

An authenticated administrator can inject arbitrary HTML or JavaScript via entity names (e.g. taxon name) that is persistently rendered for all users.

Patches

The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.

Workarounds

Override vulnerable templates and JavaScript controllers at the project level.

---

Step 1 — Override shop breadcrumbs template

templates/bundles/SyliusShopBundle/shared/breadcrumbs.html.twig:

twig {% macro breadcrumbs(items) %} <ol class="breadcrumb" aria-label="breadcrumbs"> {% for item in items %} <li class="breadcrumb-item fw-normal{{ item.active is defined and item.active ? ' active' }}"> {% if item.path is defined %} <a class="link-reset" href="{{ item.path }}" {{ item.testattribute is defined ? syliustesthtmlattribute(item.testattribute) }}>{{ item.label }}</a> {% else %} <span class="text-body-tertiary text-break" {{ item.testattribute is defined ? syliustesthtmlattribute(item.testattribute) }}>{{ item.label }}</span> {% endif %} </li> {% endfor %} </ol> {% endmacro %}

Step 2 — Override order breadcrumbs template

templates/bundles/SyliusShopBundle/account/order/show/content/breadcrumbs.html.twig:

twig {% from '@SyliusShop/shared/breadcrumbs.html.twig' import breadcrumbs as breadcrumbs %}

{% set order = hookablemetadata.context.order %}

<div class="col-12"> {{ breadcrumbs([ { label: 'sylius.ui.home'|trans, path: path('syliusshophomepage')}, { label: 'sylius.ui.myaccount'|trans, path: path('syliusshopaccountdashboard')}, { label: 'sylius.ui.orderhistory'|trans, path: path('syliusshopaccountorderindex')}, { label: '#'~order.number, active: true, testattribute: 'order-number' } ]) }} </div>

Step 3 — Override ProductTaxonTreeController.js

Disable the vendor controller in assets/admin/controllers.json:

diff "product-taxon-tree": { - "enabled": true, + "enabled": false, "fetch": "lazy" },

Create assets/admin/controllers/producttaxontreecontroller.js — copy the original from vendor/sylius/sylius/src/Sylius/Bundle/AdminBundle/Resources/assets/controllers/ProductTaxonTreeController.js and apply the following change:

diff + const escapeHtml = (str) => { + const div = document.createElement('div'); + div.textContent = str; + return div.innerHTML; + };

// in rowRenderer: - <span class="infinite-tree-title">${name}</span> + <span class="infinite-tree-title">${escapeHtml(name)}</span>

Register the patched controller in assets/admin/bootstrap.js:

js import ProductTaxonTreeController from './controllers/producttaxontreecontroller'; app.register('sylius--admin-bundle--product-taxon-tree', ProductTaxonTreeController);

Step 4 — Add autocomplete XSS protection

assets/admin/scripts/autocomplete-xss-protection.js:

js const escapeHtml = (str) => { if (typeof str !== 'string') return str; const div = document.createElement('div'); div.textContent = str; return div.innerHTML; };

document.addEventListener('autocomplete:pre-connect', (event) => { const options = event.detail.options; if (!options.render) return;

const labelField = options.labelField || 'text'; const wrapRenderer = (renderer) => { if (!renderer) return renderer; return (data, escape) => { const escaped = { ...data }; if (escaped[labelField]) { escaped[labelField] = escapeHtml(escaped[labelField]); } return renderer(escaped, escape); }; };

if (options.render.item) options.render.item = wrapRenderer(options.render.item); if (options.render.option) options.render.option = wrapRenderer(options.render.option); });

Import in assets/admin/entrypoint.js before bootstrap:

diff + import './scripts/autocomplete-xss-protection'; import './bootstrap.js';

Step 5 — Rebuild assets

bash yarn encore dev # or: yarn encore production

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability: - Djibril Mounkoro (@whiteov3rflow) - Bartłomiej Nowiński (@bnBart)

For more information

If you have any questions or comments about this advisory:

- Open an issue in Sylius issues - Email us at security@sylius.com

Impact

A cross-site scripting (XSS) vulnerability exists in the shop checkout login form handled by the ApiLoginController Stimulus controller.

When a login attempt fails, AuthenticationFailureHandler returns a JSON response whose message field is rendered into the DOM using innerHTML, allowing any HTML or JavaScript in that value to be parsed and executed by the browser.

The message value originates from AuthenticationException::getMessageKey() passed through Symfony's translator (security domain, using the request locale). In the default Sylius installation, this returns a hardcoded translation key (e.g. "Invalid credentials."), which is not directly user-controlled. However, using innerHTML with server-derived data violates defense-in-depth principles, and the risk escalates significantly under realistic scenarios: - Customized authentication handlers — if a project overrides AuthenticationFailureHandler to include user-supplied data in the message (e.g. "No account found for <username>"), an attacker can inject arbitrary JavaScript directly via the login form without any privileged access. - Translation injection — if translation files are sourced from an untrusted database or CMS and contain HTML, the message could carry a malicious payload. - Man-in-the-Middle — if the response is intercepted (e.g. on HTTP or via a compromised proxy), an attacker can inject arbitrary HTML/JS into the message field. - Server-side injection — if any middleware, reverse proxy, or error handler modifies the JSON response body, malicious content could be injected into the message field.

Exploitation could lead to session hijacking, credential theft, cart/order manipulation, or phishing within the trusted shop domain.

The vulnerability affects all Sylius installations that use the default shop checkout login form with the bundled ApiLoginController.js.

Patches The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.

Workarounds Override the vulnerable JavaScript controller at the project level. Note: Step 2 differs between Sylius 2.0 and up

Step 1. Override JavaScript controller handling login Patch ApiLoginController.js

Copy the original from vendor/sylius/sylius/src/Sylius/Bundle/ShopBundle/Resources/assets/controllers/ApiLoginController.js to assets/shop/controllers/ApiLoginController.js and apply: diff ... .then(response => { if (response.success) { window.location.reload(); } else { const errorElement = this.errorPrototypeTarget.cloneNode(true); - errorElement.innerHtml = response.message; + errorElement.textContent = response.message; this.errorTarget.innerHTML = errorElement.outerHTML; } }) ...

Step 2. Register the patched controller Sylius 2.1+ (Stimulus Bridge with controllers.json)

Disable the vendor controller in assets/shop/controllers.json: diff ... "api-login": { - "enabled": true, + "enabled": false, "fetch": "lazy" } ... Register the overwritten controller in assets/shop/bootstrap.js js import ApiLoginController from './controllers/ApiLoginController'

app.register('sylius--shop-bundle--api-login', ApiLoginController); --- Sylius 2.0 (explicit imports in vendor app.js)

Use Webpack's NormalModuleReplacementPlugin to swap the controller at build time. In webpack.config.js, after shopConfig is created:

diff + const webpack = require('webpack'); ... // Shop config const shopConfig = SyliusShop.getWebpackConfig(path.resolve(dirname)); + shopConfig.plugins.push( + new webpack.NormalModuleReplacementPlugin( + /\/controllers\/ApiLoginController\.js$/, + path.resolve(dirname, 'assets/shop/controllers/ApiLoginController.js') + ) + ); ...

Step 3. Rebuild assets

bash yarn encore dev # or: yarn encore production

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability: - Bartłomiej Nowiński (@bnBart)

For more information

If you have any questions or comments about this advisory:

- Open an issue in Sylius issues - Email us at security@sylius.com

Impact CurrencySwitchController::switchAction(), ImpersonateUserController::impersonateAction() and StorageBasedLocaleSwitcher::handle() use the HTTP Referer header directly when redirecting.

The attack requires the victim to click a legitimate application link placed on an attacker-controlled page. The browser automatically sends the attacker's site as the Referer, and the application redirects back to it. This can be used for phishing or credential theft, as the redirect originates from a trusted domain.

The severity varies by endpoint; public endpoints require no authentication and are trivially exploitable, while admin-only endpoints require an authenticated session but remain vulnerable if an admin follows a link from an external source such as email or chat.

Affected classes: - CurrencySwitchController::switchAction() - public - StorageBasedLocaleSwitcher::handle() - public, used in locale switching without having locale in the url - ImpersonateUserController::impersonateAction() - admin-only

Patches The issue is fixed in versions: 1.9.12, 1.10.16, 1.11.17, 1.12.23, 1.13.15, 1.14.18, 2.0.16, 2.1.12, 2.2.3 and above.

Workarounds If you cannot update Sylius immediately, copy the affected classes from vendor to your project's src/ directory, apply the fix, and override the service definitions.

Step 1 - CurrencySwitchController

Copy from vendor/sylius/sylius/src/Sylius/Bundle/ShopBundle/Controller/CurrencySwitchController.php to src/Controller/CurrencySwitchController.php and apply the following changes:

diff -namespace Sylius\Bundle\ShopBundle\Controller; +namespace App\Controller;

use Sylius\Component\Channel\Context\ChannelContextInterface; use Sylius\Component\Core\Currency\CurrencyStorageInterface; use Sylius\Component\Core\Model\ChannelInterface; use Symfony\Component\HttpFoundation\RedirectResponse; use Symfony\Component\HttpFoundation\Request; use Symfony\Component\HttpFoundation\Response; +use Symfony\Component\Routing\RouterInterface;

final class CurrencySwitchController { public function construct( private Environment $templatingEngine, // for 1.x version private CurrencyStorageInterface $currencyStorage, private ChannelContextInterface $channelContext, + private RouterInterface $router, ) { }

public function switchAction(Request $request, string $code): Response { / @var ChannelInterface $channel / $channel = $this->channelContext->getChannel();

$this->currencyStorage->set($channel, $code);

- return new RedirectResponse($request->headers->get('referer', $request->getSchemeAndHttpHost())); + return new RedirectResponse($this->router->generate('syliusshophomepage')); } }

Step 2 - ImpersonateUserController

Copy from vendor/sylius/sylius/src/Sylius/Bundle/AdminBundle/Controller/ImpersonateUserController.php to src/Controller/Admin/ImpersonateUserController.php and apply the following changes:

diff -namespace Sylius\Bundle\AdminBundle\Controller; +namespace App\Controller\Admin;

// ... (keep all existing use statements)

public function impersonateAction(Request $request, string $username): Response { // ... (keep authorization check and impersonation logic)

$this->addFlash($request, $username);

- $redirectUrl = $request->headers->get( - 'referer', + return new RedirectResponse( $this->router->generate('syliusadmincustomershow', ['id' => $user->getId()]) ); - - return new RedirectResponse($redirectUrl); }

Step 3 - StorageBasedLocaleSwitcher (only if you use localeswitcher: storage)

Note: Skip this step if you use the default localeswitcher: url mode.

Copy from vendor/sylius/sylius/src/Sylius/Bundle/ShopBundle/Locale/StorageBasedLocaleSwitcher.php to src/Locale/StorageBasedLocaleSwitcher.php and apply the following changes:

For Sylius 1.9 – 2.1.2:

diff -namespace Sylius\Bundle\ShopBundle\Locale; +namespace App\Locale;

use Sylius\Bundle\ShopBundle\Locale\LocaleSwitcherInterface; use Sylius\Component\Channel\Context\ChannelContextInterface; use Sylius\Component\Core\Locale\LocaleStorageInterface; use Symfony\Component\HttpFoundation\RedirectResponse; use Symfony\Component\HttpFoundation\Request; +use Symfony\Component\Routing\RouterInterface;

final class StorageBasedLocaleSwitcher implements LocaleSwitcherInterface { public function construct( private LocaleStorageInterface $localeStorage, private ChannelContextInterface $channelContext, + private RouterInterface $router, ) { }

public function handle(Request $request, string $localeCode): RedirectResponse { $this->localeStorage->set($this->channelContext->getChannel(), $localeCode);

- return new RedirectResponse($request->headers->get('referer', $request->getSchemeAndHttpHost())); + return new RedirectResponse($this->router->generate('syliusshophomepage')); } }

For Sylius 2.1.3 and later:

In Sylius 2.1.3 the class was refactored to use UrlMatcherInterface. While this adds partial validation, it still passes the full referer URL to RedirectResponse, so the open redirect remains exploitable.

diff -namespace Sylius\Bundle\ShopBundle\Locale; +namespace App\Locale;

use Sylius\Bundle\ShopBundle\Locale\LocaleSwitcherInterface; use Sylius\Component\Channel\Context\ChannelContextInterface; use Sylius\Component\Core\Locale\LocaleStorageInterface; use Symfony\Component\HttpFoundation\RedirectResponse; use Symfony\Component\HttpFoundation\Request; -use Symfony\Component\Routing\Exception\ResourceNotFoundException; -use Symfony\Component\Routing\Matcher\UrlMatcherInterface; +use Symfony\Component\Routing\RouterInterface;

final class StorageBasedLocaleSwitcher implements LocaleSwitcherInterface { public function construct( private LocaleStorageInterface $localeStorage, private ChannelContextInterface $channelContext, - private ?UrlMatcherInterface $urlMatcher = null, + private RouterInterface $router, ) { - if (null === $this->urlMatcher) { - triggerdeprecation( - 'sylius/shop-bundle', - '2.1', - 'Not passing a "%s" to "%s" is deprecated and will be required in Sylius 3.0.', - UrlMatcherInterface::class, - self::class, - ); - } }

public function handle(Request $request, string $localeCode): RedirectResponse { $this->localeStorage->set($this->channelContext->getChannel(), $localeCode); - $url = $request->headers->get('referer', $request->getSchemeAndHttpHost()); - - if ($this->urlMatcher) { - try { - $this->urlMatcher->match($url); - } catch (ResourceNotFoundException) { - return new RedirectResponse($request->getSchemeAndHttpHost()); - } - } - - return new RedirectResponse($url); + return new RedirectResponse($this->router->generate('syliusshophomepage')); } }

Step 4 - Override the services

Add to config/services.yaml.

Sylius 1.x (1.9 – 1.14):

yaml services: # ... your existing services ...

sylius.controller.shop.currencyswitch: class: App\Controller\CurrencySwitchController public: true arguments: $templatingEngine: '@twig' $currencyStorage: '@sylius.storage.currency' $channelContext: '@sylius.context.channel' $router: '@router'

sylius.controller.shop.impersonateuser: class: App\Controller\Admin\ImpersonateUserController public: true arguments: $impersonator: '@sylius.admin.security.userimpersonator' $authorizationChecker: '@security.authorizationchecker' $userProvider: '@sylius.adminuserprovider.emailornamebased' $router: '@router' $authorizationRole: 'ROLEADMINISTRATIONACCESS'

# Only if you use localeswitcher: storage sylius.shop.localeswitcher: class: App\Locale\StorageBasedLocaleSwitcher public: false arguments: $localeStorage: '@sylius.storage.locale' $channelContext: '@sylius.context.channel' $router: '@router'

Sylius 2.x (2.0 – 2.1):

yaml services: # ... your existing services ...

syliusshop.controller.currencyswitch: class: App\Controller\CurrencySwitchController public: true arguments: $currencyStorage: '@sylius.storage.currency' $channelContext: '@sylius.context.channel' $router: '@router'

syliusadmin.controller.impersonateuser: class: App\Controller\Admin\ImpersonateUserController public: true arguments: $impersonator: '@syliusadmin.security.shopuserimpersonator' $authorizationChecker: '@security.authorizationchecker' $userProvider: '@sylius.shopuserprovider.emailornamebased' $router: '@router' $authorizationRole: 'ROLEADMINISTRATIONACCESS'

# Only if you use localeswitcher: storage syliusshop.localeswitcher: class: App\Locale\StorageBasedLocaleSwitcher public: false arguments: $localeStorage: '@sylius.storage.locale' $channelContext: '@sylius.context.channel' $router: '@router'

Step 5 - Clear cache

bash bin/console cache:clear

---

Customizing the redirect target

If you need a different redirect target, override the route definition with the sylius.redirect attribute:

yaml config/routes/syliusshop.yaml (AFTER the syliusshop resource import) syliusshopswitchcurrency: path: /{locale}/switch-currency/{code} methods: [GET] defaults: controller: sylius.controller.shop.currencyswitch:switchAction sylius: redirect: syliusshopproductindex # or any route name

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability: - Bartłomiej Nowiński (@bnBart)

For more information

If you have any questions or comments about this advisory:

- Open an issue in Sylius issues - Email us at security@sylius.com

Impact An authenticated Insecure Direct Object Reference (IDOR) vulnerability exists in multiple shop LiveComponents due to unvalidated resource IDs accepted via #[LiveArg] parameters. Unlike props, which are protected by LiveComponent's @checksum, args are fully user-controlled - any action that accepts a resource ID via #[LiveArg] and loads it with ->find() without ownership validation is vulnerable.

Checkout address FormComponent (addressFieldUpdated action): Accepts an addressId via #[LiveArg] and loads it without verifying ownership, exposing another user's first name, last name, company, phone number, street, city, postcode, and country.

Cart WidgetComponent (refreshCart action): Accepts a cartId via #[LiveArg] and loads any order directly from the repository, exposing order total and item count.

Cart SummaryComponent (refreshCart action): Accepts a cartId via #[LiveArg] and loads any order directly from the repository, exposing subtotal, discount, shipping cost, taxes (excluded and included), and order total.

Since syliusorder contains both active carts (state=cart) and completed orders (state=new/fulfilled) in the same ID space, the cart IDOR exposes data from all orders, not just active carts.

Patches The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3 and above.

Workarounds

Override vulnerable LiveComponent classes at the project level to add authorization checks to #[LiveArg] parameters.

Step 1. Exclude component overrides from default autowiring

In config/services.yaml, add Twig/Component to the exclude list to prevent duplicate service registration:

yaml App\: resource: '../src/' exclude: '../src/{Entity,Kernel.php,Twig/Components}'

Step 2. Override checkout address FormComponent

Create src/Twig/Components/Checkout/Address/FormComponent.php:

php <?php

declare(stricttypes=1);

namespace App\Twig\Components\Checkout\Address;

use Sylius\Bundle\ShopBundle\Twig\Component\Checkout\Address\AddressBookComponent; use Sylius\Bundle\UiBundle\Twig\Component\ResourceFormComponentTrait; use Sylius\Bundle\UiBundle\Twig\Component\TemplatePropTrait; use Sylius\Component\Core\Model\OrderInterface; use Sylius\Component\Core\Model\ShopUserInterface; use Sylius\Component\Core\Repository\AddressRepositoryInterface; use Sylius\Component\Core\Repository\OrderRepositoryInterface; use Sylius\Component\Customer\Context\CustomerContextInterface; use Sylius\Component\User\Repository\UserRepositoryInterface; use Symfony\Component\Form\FormFactoryInterface; use Symfony\Component\Form\FormInterface; use Symfony\UX\LiveComponent\Attribute\AsLiveComponent; use Symfony\UX\LiveComponent\Attribute\LiveArg; use Symfony\UX\LiveComponent\Attribute\LiveListener; use Symfony\UX\LiveComponent\Attribute\LiveProp; use Symfony\UX\LiveComponent\Attribute\PreReRender;

#[AsLiveComponent] class FormComponent { / @use ResourceFormComponentTrait<OrderInterface> / use ResourceFormComponentTrait; use TemplatePropTrait;

#[LiveProp] public bool $emailExists = false;

/ @param OrderRepositoryInterface<OrderInterface> $repository @param UserRepositoryInterface<ShopUserInterface> $shopUserRepository / public function construct( OrderRepositoryInterface $repository, FormFactoryInterface $formFactory, string $resourceClass, string $formClass, protected readonly CustomerContextInterface $customerContext, protected readonly UserRepositoryInterface $shopUserRepository, protected readonly AddressRepositoryInterface $addressRepository, ) { $this->initialize($repository, $formFactory, $resourceClass, $formClass); }

#[PreReRender(priority: -100)] public function checkEmailExist(): void { $email = $this->formValues['customer']['email'] ?? null; if (null !== $email) { $this->emailExists = $this->shopUserRepository->findOneByEmail($email) !== null; } }

#[LiveListener(AddressBookComponent::SYLIUSSHOPADDRESSUPDATED)] public function addressFieldUpdated(#[LiveArg] mixed $addressId, #[LiveArg] string $field): void { $customer = $this->customerContext->getCustomer(); if (null === $customer) { return; }

// Fix: findOneByCustomer instead of find — validates ownership $address = $this->addressRepository->findOneByCustomer((string) $addressId, $customer); if (null === $address) { return; }

$newAddress = []; $newAddress['firstName'] = $address->getFirstName(); $newAddress['lastName'] = $address->getLastName(); $newAddress['phoneNumber'] = $address->getPhoneNumber(); $newAddress['company'] = $address->getCompany(); $newAddress['countryCode'] = $address->getCountryCode(); if ($address->getProvinceCode() !== null) { $newAddress['provinceCode'] = $address->getProvinceCode(); } if ($address->getProvinceName() !== null) { $newAddress['provinceName'] = $address->getProvinceName(); } $newAddress['street'] = $address->getStreet(); $newAddress['city'] = $address->getCity(); $newAddress['postcode'] = $address->getPostcode();

$this->formValues[$field] = $newAddress; }

protected function instantiateForm(): FormInterface { return $this->formFactory->create( $this->formClass, $this->resource, ['customer' => $this->customerContext->getCustomer()], ); } }

Step 3. Override cart WidgetComponent

Create src/Twig/Components/Cart/WidgetComponent.php:

php <?php

declare(stricttypes=1);

namespace App\Twig\Components\Cart;

use Sylius\Bundle\ShopBundle\Twig\Component\Cart\FormComponent; use Sylius\Bundle\UiBundle\Twig\Component\ResourceLivePropTrait; use Sylius\Bundle\UiBundle\Twig\Component\TemplatePropTrait; use Sylius\Component\Core\Model\OrderInterface; use Sylius\Component\Core\Repository\OrderRepositoryInterface; use Sylius\Component\Order\Context\CartContextInterface; use Sylius\Component\Order\Context\CartNotFoundException; use Sylius\Resource\Model\ResourceInterface; use Sylius\TwigHooks\LiveComponent\HookableLiveComponentTrait; use Symfony\UX\LiveComponent\Attribute\AsLiveComponent; use Symfony\UX\LiveComponent\Attribute\LiveArg; use Symfony\UX\LiveComponent\Attribute\LiveListener; use Symfony\UX\LiveComponent\Attribute\LiveProp; use Symfony\UX\LiveComponent\DefaultActionTrait; use Symfony\UX\TwigComponent\Attribute\PreMount;

#[AsLiveComponent] class WidgetComponent { use DefaultActionTrait; use HookableLiveComponentTrait; use TemplatePropTrait;

/ @use ResourceLivePropTrait<OrderInterface> / use ResourceLivePropTrait;

#[LiveProp(hydrateWith: 'hydrateResource', dehydrateWith: 'dehydrateResource')] public ?ResourceInterface $cart = null;

public function construct( protected readonly CartContextInterface $cartContext, OrderRepositoryInterface $orderRepository, ) { $this->initialize($orderRepository); }

#[PreMount] public function initializeCart(): void { $this->cart = $this->getCart(); }

#[LiveListener(FormComponent::SYLIUSSHOPCARTCHANGED)] #[LiveListener(FormComponent::SYLIUSSHOPCARTCLEARED)] public function refreshCart(#[LiveArg] mixed $cartId = null): void { // Fix: ignore user-supplied cartId, always load from session $this->cart = $this->getCart(); }

private function getCart(): ?OrderInterface { try { return $this->cartContext->getCart(); } catch (CartNotFoundException) { return null; }

return $cart; } }

Step 4. Override cart SummaryComponent

Create src/Twig/Components/Cart/SummaryComponent.php:

php <?php

declare(stricttypes=1);

namespace App\Twig\Components\Cart;

use Sylius\Bundle\ShopBundle\Twig\Component\Cart\FormComponent; use Sylius\Bundle\UiBundle\Twig\Component\ResourceLivePropTrait; use Sylius\Bundle\UiBundle\Twig\Component\TemplatePropTrait; use Sylius\Component\Core\Model\OrderInterface; use Sylius\Component\Core\Repository\OrderRepositoryInterface; use Sylius\Resource\Model\ResourceInterface; use Sylius\TwigHooks\LiveComponent\HookableLiveComponentTrait; use Symfony\UX\LiveComponent\Attribute\AsLiveComponent; use Symfony\UX\LiveComponent\Attribute\LiveArg; use Symfony\UX\LiveComponent\Attribute\LiveListener; use Symfony\UX\LiveComponent\Attribute\LiveProp; use Symfony\UX\LiveComponent\DefaultActionTrait;

#[AsLiveComponent] class SummaryComponent { use DefaultActionTrait; use HookableLiveComponentTrait;

/ @use ResourceLivePropTrait<OrderInterface> / use ResourceLivePropTrait; use TemplatePropTrait;

#[LiveProp(hydrateWith: 'hydrateResource', dehydrateWith: 'dehydrateResource')] public ?ResourceInterface $cart = null;

/ @param OrderRepositoryInterface<OrderInterface> $orderRepository / public function construct(OrderRepositoryInterface $orderRepository) { $this->initialize($orderRepository); }

#[LiveListener(FormComponent::SYLIUSSHOPCARTCHANGED)] public function refreshCart(#[LiveArg] mixed $cartId): void { // Fix: ignore user-supplied cartId, reload from checksummed cart prop if ($this->cart === null) { return; }

$this->cart = $this->hydrateResource($this->cart->getId()); } }

Step 5. Register overridden services

In config/services.yaml, add:

yaml syliusshop.twig.component.checkout.address.form: class: App\Twig\Components\Checkout\Address\FormComponent arguments: $repository: '@sylius.repository.order' $formFactory: '@form.factory' $resourceClass: '%sylius.model.order.class%' $formClass: 'Sylius\Bundle\ShopBundle\Form\Type\Checkout\AddressType' $customerContext: '@sylius.context.customer' $shopUserRepository: '@sylius.repository.shopuser' $addressRepository: '@sylius.repository.address' tags: - { name: 'sylius.livecomponent.shop', key: 'syliusshop:checkout:address:form' }

syliusshop.twig.component.cart.widget: class: App\Twig\Components\Cart\WidgetComponent arguments: $cartContext: '@sylius.context.cart.composite' $orderRepository: '@sylius.repository.order' tags: - { name: 'sylius.livecomponent.shop', key: 'syliusshop:cart:widget' }

syliusshop.twig.component.cart.summary: class: App\Twig\Components\Cart\SummaryComponent arguments: $orderRepository: '@sylius.repository.order' tags: - { name: 'sylius.livecomponent.shop', key: 'syliusshop:cart:summary' }

Step 6. Clear cache

bash php bin/console cache:clear

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability: - Peter Stöckli (@p-) - Man Yue Mo (@m-y-mo) - The GitHub Security Lab team

For more information If you have any questions or comments about this advisory:

- Open an issue in Sylius issues - Email us at security@sylius.com

Impact The POST /api/v2/shop/orders/{tokenValue}/items endpoint does not verify cart ownership. An unauthenticated attacker can add items to other registered customers' carts by knowing the cart tokenValue.

POST /api/v2/shop/orders/{tokenValue}/items

Other mutation endpoints (PUT, PATCH, DELETE) are not affected. API Platform loads the Order entity through the state provider for these operations, which triggers VisitorBasedExtension and returns 404 for unauthorized users.

An attacker who obtains a cart tokenValue can add arbitrary items to another customer's cart. The endpoint returns the full cart representation in the response (HTTP 201), potentially leaking:

- Customer email address - Cart contents (products, quantities, prices) - Address data (billing and shipping if set) - Payment and shipment IDs - Order totals and tax breakdown - Checkout state

Patches The issue is fixed in versions: 2.0.16, 2.1.12, 2.2.3, and above.

Workarounds Add an ownership check in AddItemToCartHandler by injecting UserContextInterface and verifying the current user matches the cart owner before adding items.

Step 1. Patch the handler

Create new src/CommandHandler/Cart/AddItemToCartHandler.php:

php <?php

declare(stricttypes=1);

namespace App\CommandHandler\Cart;

use Sylius\Bundle\ApiBundle\Command\Cart\AddItemToCart; use Sylius\Bundle\ApiBundle\Context\UserContextInterface; use Sylius\Component\Core\Factory\CartItemFactoryInterface; use Sylius\Component\Core\Model\OrderInterface; use Sylius\Component\Core\Model\OrderItemInterface; use Sylius\Component\Core\Model\ProductVariantInterface; use Sylius\Component\Core\Model\ShopUserInterface; use Sylius\Component\Core\Repository\OrderRepositoryInterface; use Sylius\Component\Core\Repository\ProductVariantRepositoryInterface; use Sylius\Component\Order\Modifier\OrderItemQuantityModifierInterface; use Sylius\Component\Order\Modifier\OrderModifierInterface; use Symfony\Component\HttpKernel\Exception\NotFoundHttpException; use Symfony\Component\Messenger\Attribute\AsMessageHandler;

#[AsMessageHandler] final readonly class AddItemToCartHandler { public function construct( private OrderRepositoryInterface $orderRepository, private ProductVariantRepositoryInterface $productVariantRepository, private OrderModifierInterface $orderModifier, private CartItemFactoryInterface $cartItemFactory, private OrderItemQuantityModifierInterface $orderItemQuantityModifier, private UserContextInterface $userContext, ) { }

public function invoke(AddItemToCart $addItemToCart): OrderInterface { / @var ProductVariantInterface|null $productVariant / $productVariant = $this->productVariantRepository->findOneBy(['code' => $addItemToCart->productVariantCode]);

if ($productVariant === null) { throw new \InvalidArgumentException('Product variant with given code has not been found.'); }

/ @var OrderInterface|null $cart / $cart = $this->orderRepository->findCartByTokenValue($addItemToCart->orderTokenValue);

if ($cart === null) { throw new \InvalidArgumentException('Cart with given token has not been found.'); }

$this->assertCartAccessible($cart);

/ @var OrderItemInterface $cartItem / $cartItem = $this->cartItemFactory->createNew(); $cartItem->setVariant($productVariant);

$this->orderItemQuantityModifier->modify($cartItem, $addItemToCart->quantity); $this->orderModifier->addToOrder($cart, $cartItem);

return $cart; }

private function assertCartAccessible(OrderInterface $cart): void { if ($cart->isCreatedByGuest()) { return; }

$cartCustomer = $cart->getCustomer();

if (null === $cartCustomer || null === $cartCustomer->getUser()) { return; }

$currentUser = $this->userContext->getUser();

if ( $currentUser instanceof ShopUserInterface && $currentUser->getCustomer()?->getId() === $cartCustomer->getId() ) { return; }

throw new NotFoundHttpException('Cart not found.'); } }

Step 2. Override the service

diff config/services.yaml

services: App\: resource: '../src/' - exclude: '../src/{Entity,Kernel.php}' + exclude: '../src/{Entity,Kernel.php,CommandHandler}'

syliusapi.commandhandler.cart.additemtocart: class: App\CommandHandler\Cart\AddItemToCartHandler arguments: $orderRepository: '@sylius.repository.order' $productVariantRepository: '@sylius.repository.productvariant' $orderModifier: '@sylius.modifier.order' $cartItemFactory: '@sylius.factory.orderitem' $orderItemQuantityModifier: '@sylius.modifier.orderitemquantity' $userContext: '@Sylius\Bundle\ApiBundle\Context\UserContextInterface' tags: - { name: messenger.messagehandler, bus: sylius.commandbus }

Step 3. Clear cache

bash bin/console cache:clear

Reporters

We would like to extend our gratitude to the following individuals for their detailed reporting and responsible disclosure of this vulnerability: - @rokorolov

For more information If you have any questions or comments about this advisory:

- Open an issue in Sylius issues - Email us at security@sylius.com

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-7prj-9ccr-hr3q. This link is maintained to preserve external references.

Original Description Sylius 1.12.13 is vulnerable to Cross Site Scripting (XSS) via the "Province" field in Address Book.