Welcart e-Commerce WordPress plugin vulnerabilities

The Welcart e-Commerce plugin for WordPress in versions up to and including 2.12.5 is vulnerable to Stored Cross-Site Scripting via the 'gid' parameter. An unauthenticated attacker can inject arbitrary web scripts that execute when an administrator opens the order in the WordPress admin panel.

The Welcart e-Commerce WordPress plugin before 2.12.6 does not properly verify authorization against the targeted product before processing SKU changes, because its capability check is not tied to the product being edited. This allows any authenticated user with Author-level access or higher to read, modify, create, delete and re-order the SKU data (including prices, confidential cost prices and stock levels) of any product, including those belonging to other users.

The Welcart e-Commerce WordPress plugin before 2.12.6 does not validate a user-supplied URL before using it in a redirect. This allows unauthenticated attackers to redirect users to arbitrary external websites.

The Welcart e-Commerce WordPress plugin before 2.12.6 does not properly sanitise and escape a parameter before using it in a SQL query, and strips the escaping it had applied before running the query. This allows users with the Editor role or higher to perform SQL injection attacks.

The Welcart e-Commerce WordPress plugin before 2.11.32 does not properly sanitise a value taken from an imported CSV file before using it in a SQL statement. Users with the Editor role and above (including custom shop-management roles) can perform SQL injection attacks.