The Freemius SDK, as used by hundreds of WordPress plugin and theme developers, was vulnerable to Cross-Site Request Forgery and Information disclosure due to missing capability checks and nonce protection on the _get_debug_log, _get_db_option, and the _set_db_option functions in versions up to, and including 2.4.2. Any WordPress plugin or theme running a version of Freemius less than 2.4.3 is vulnerable.

The request_list_request AJAX call of the Car Seller - Auto Classifieds Script WordPress plugin through 2.1.0, available to both authenticated and unauthenticated users, does not sanitise, validate or escape the order_id POST parameter before using it in a SQL statement, leading to a SQL Injection issue.

Unrestricted file upload vulnerability in ScriptsFeed Auto Classifieds allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension as a profile logo, then accessing it via a direct request to the file in cars_images/.

Unrestricted file upload vulnerability in PHPStore Auto Classifieds allows remote authenticated users to execute arbitrary code by uploading a file with an executable extension as a logo, then accessing it via a direct request to the file in cars/cars_images/.

Multiple SQL injection vulnerabilities in Open Auto Classifieds 1.4.3b allow remote attackers to execute arbitrary SQL commands via (1) the id parameter to listings.php and (2) the username field to login.php.