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The Acadlix LMS – AI Quiz Maker, Online Exam & Course Plugin for WordPress plugin for WordPress is vulnerable to arbitrary file deletion due to insufficient file path validation in the post_delete_assessment_file_by_id function in all versions up to, and including, 1.1.9. This makes it possible for authenticated attackers, with subscriber-level access and above, to delete arbitrary files on the server, which can easily lead to remote code execution when the right file is deleted (such as wp-config.php). The route's permission callback only verifies a generic wp_rest nonce that the plugin itself emits inside the public acadlixOptions JavaScript object on every frontend page, effectively reducing the authentication requirement to unauthenticated.

• https://www.wordfence.com/threat-intel/vulnerabilities/id/b54682f6-914e-4c16-b8fb-63b5dcb14933?source=cve
• https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/REST/Front/FrontQuizController.php#L692
• https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/REST/Front/FrontQuizController.php#L680
• https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/REST/Front/FrontQuizController.php#L807
• https://plugins.trac.wordpress.org/browser/acadlix/tags/1.1.8/includes/Common/Assets/Manager.php#L570