Authorization bypass through user-controlled key in Chamilo LMS - CVE-2026-61623
Published: August 4, 2026
Vulnerability identifier: #VU140911
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-61623
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information.
The vulnerability exists due to authorization bypass through a user-controlled key in public/main/my_space/myStudents.php when handling a user-supplied student parameter. A remote user can supply an arbitrary student parameter to disclose sensitive information.
The issue exposes quiz scores, learning progress, time-on-task, last login, and personal details for students not enrolled in any course taught by the requesting teacher.
Affected software
Chamilo LMS
How to mitigate CVE-2026-61623
Install security update from vendor's website.
Chamilo LMS - addressed in versions 1.11.40, 2.0.3