Joomla Extension - j2commerce.com - Reflected XSS via filtertag, pricefrom and priceto in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - Four task handlers accepted a base64-encoded URL from user input and redirected to it without validating the destination host, enabling phishing using the shop's trusted domain. No authentication required.

Joomla Extension - j2commerce.com - Missing authorization on Apps controller delegation chain in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - J2StoreControllerApps's appTask delegation path instantiates app-plugin controllers with no ACL check anywhere in the code. It currently returns 403 only as a side effect of fof.xml's wildcard-deny resolving under the singularised ACL key app, which has no explicit allow rule — not because of any deliberate check. Behind that path, applocalizationdata::getInstallerTool() used a caller-influenced table name with no allow-list, both to select a #j2store table for truncation and to build a path to SQL files it then executes — a path-traversal-capable file read/execute.

Joomla Extension - j2commerce.com - Guest checkout address disclosure to any authenticated user (IDOR) in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - editAddress() redirected non-owners away only when the loaded address row had a non-empty userid belonging to someone else. Guest-checkout address rows have an empty userid, so that check never triggered for them — any logged-in account guessing a small, sequential addressid got a guest customer's full name, street address, and phone number rendered prefilled into the edit form.

Joomla Extension - j2commerce.com - Anonymous cart-record tampering via inherited FOF save task in J2Store 1.0.0-3.3.21, 4.0.0-4.0.21, 4.1.0-4.1.6 - fof.xml grants the carts view's tasks a wildcard true ACL, and FOF only enforces CSRF tokens on back-end HTML requests, not on front-end format=raw requests. J2StoreControllerCarts already scoped remove() to the caller's own session, but never overrode the generic FOF save task, so it remained reachable to insert new cart rows with an attacker-chosen userid/sessionid, or overwrite an existing row by id.

The J2Store plugin before 3.3.13 for Joomla! allows a SQL injection attack by a trusted store manager.

SQL injection vulnerability in the J2Store plugin 3.x before 3.3.7 for Joomla! allows remote attackers to execute arbitrary SQL commands via the productoption[] parameter.

Multiple SQL injection vulnerabilities in the J2Store (comj2store) extension before 3.1.7 for Joomla! allow remote attackers to execute arbitrary SQL commands via the (1) sortby or (2) manufacturerids[] parameter to index.php.