CVE-2026-34602 Chamilo LMS: IDOR in /api/course_rel_users Allows Unauthorized Enrollment of Arbitrary Users into Courses

Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, the /api/courserelusers endpoint is vulnerable to Insecure Direct Object Reference IDOR, allowing an authenticated attacker to modify the user parameter in the request body to enroll any arbitrary user into...