Authorization bypass through user-controlled key in Chamilo LMS - CVE-2026-32894
Published: April 24, 2026
Vulnerability identifier: #VU127564
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-32894
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Chamilo
Affected software:
Chamilo LMS
Chamilo LMS
Detailed vulnerability description
The vulnerability allows a remote user to delete any student's grade result across the platform.
The vulnerability exists due to authorization bypass through a user-controlled key in public/main/gradebook/gradebook_view_result.php when handling the delete_mark GET parameter. A remote user can modify the parameter value to delete any student's grade result across the platform.
The issue affects authenticated teachers and no ownership or course-scope verification is performed.
How to mitigate CVE-2026-32894
Install security update from vendor's website.