CVE-2026-18439 Tutor LMS <= 4.0.7 - Authenticated (Custom+) Insecure Direct Object Reference to Arbitrary Quiz Question/Answer Modification and Deletion via 'payload' Parameter

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 4.0.7 via the tutorquizbuildersave AJAX action due to missing validation that nested questionid, answerid, deletedquestionids, and...

CVE-2026-18439: Authorization Bypass Through User-Controlled Key

The Tutor LMS – eLearning and online course solution plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 4.0.7 via the tutorquizbuildersave AJAX action due to missing validation that nested questionid, answerid, deletedquestionids, and...