In Saleor Storefront before version 2.10.3, request data used to authenticate customers was inadvertently cached in the browser's local storage mechanism, including credentials. A malicious user with direct access to the browser could extract the email and password. In versions prior to 2.10.0 persisted the cache even after the user logged out. This is fixed in version 2.10.3. A workaround is to manually clear application data (browser's local storage) after logging into Saleor Storefront.

An issue was discovered in Mirumee Saleor 2.x before 2.9.1. Incorrect access control in the checkoutCustomerAttach mutations allows attackers to attach their checkouts to any user ID and consequently leak user data (e.g., name, address, and previous orders of any other customer).

Saleor Issue was introduced by merge commit: e1b01bad0703afd08d297ed3f1f472248312cc9c. This commit was released as part of 2.0.0 release is affected by: Incorrect Access Control. The impact is: Important. The component is: ProductVariant type in GraphQL API. The attack vector is: Unauthenticated user can access the GraphQL API (which is by default publicly exposed under `/graphql/` URL) and fetch products data which may include admin-restricted shop's revenue data. The fixed version is: 2.3.1.

In Mirumee Saleor 2.7.0 (fixed in 2.8.0), CSRF protection middleware was accidentally disabled, which allowed attackers to send a POST request without a valid CSRF token and be accepted by the server.