CVE-2026-110590: Klarna for WooCommerce <= 4.13.3 - Missing Authorization to Unauthenticated Sensitive Information Disclosure via 'order-pay' Endpoint
The Klarna for WooCommerce plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.13.3 This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for unauthenticated attackers to access any order's secret orderkey and full billing and shipping PII — including first name, last name, email address, phone number, street address, postcode, city, region, and country — emitted inline as the klarnapaymentsparams JavaScript variable, enabling full store-wide order enumeration. Because WooCommerce order IDs are sequential integers and no orderkey or authenticated session is required, every order in the store can be trivially enumerated with sequential GET requests to the order-pay endpoint.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
Any unauthenticated remote attacker can exploit it. No account, order key, or authenticated WooCommerce session is required.
What information can be exposed?
An attacker can obtain an order's secret order_key and full billing and shipping information, including names, email addresses, phone numbers, street addresses, postcodes, cities, regions, and countries.
How could an attacker access multiple orders?
WooCommerce order IDs are sequential integers, allowing attackers to send sequential GET requests to the order-pay endpoint and enumerate orders across the store.
Which plugin versions are affected?
All Klarna for WooCommerce versions up to and including 4.13.3 are affected.