Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an insecure direct object modification vulnerability in the PUT /api/users/{id} endpoint allows any authenticated user with ROLE_STUDENT to escalate their privileges to ROLE_ADMIN by modifying the roles field on their own user record. The API Platform security expression is_granted('EDIT', object) only verifies record ownership, and the roles field is included in the writable serialization group, enabling any user to set arbitrary roles such as ROLE_ADMIN. Successful exploitation grants full administrative control of the platform, including access to all courses, user data, grades, and administrative settings. This issue has been fixed in version 2.0.0-RC.3.
History

Wed, 15 Apr 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 15 Apr 2026 14:00:00 +0000

Type Values Removed Values Added
First Time appeared Chamilo
Chamilo chamilo Lms
Vendors & Products Chamilo
Chamilo chamilo Lms

Tue, 14 Apr 2026 22:00:00 +0000

Type Values Removed Values Added
Description Chamilo LMS is an open-source learning management system. In versions prior to 2.0.0-RC.3, an insecure direct object modification vulnerability in the PUT /api/users/{id} endpoint allows any authenticated user with ROLE_STUDENT to escalate their privileges to ROLE_ADMIN by modifying the roles field on their own user record. The API Platform security expression is_granted('EDIT', object) only verifies record ownership, and the roles field is included in the writable serialization group, enabling any user to set arbitrary roles such as ROLE_ADMIN. Successful exploitation grants full administrative control of the platform, including access to all courses, user data, grades, and administrative settings. This issue has been fixed in version 2.0.0-RC.3.
Title Chamilo LMS has Privilege Escalation via API User Role Modification
Weaknesses CWE-269
CWE-863
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-04-14T21:37:55.490Z

Updated: 2026-04-15T14:24:29.902Z

Reserved: 2026-04-10T20:22:44.035Z

Link: CVE-2026-40291

cve-icon Vulnrichment

Updated: 2026-04-15T14:24:26.077Z

cve-icon NVD

Status : Received

Published: 2026-04-14T22:16:32.507

Modified: 2026-04-14T22:16:32.507

Link: CVE-2026-40291

cve-icon Redhat

No data.