Vulnerability · Published Apr 14, 2026 · Assigned by GitHub_M
CVE-2026-40291Chamilo LMS has Privilege Escalation via API User Role Modification
High 8.8
In plain English
A high-severity privilege mismanagement in chamilo-lms from chamilo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| chamilo | chamilo-lms | < 2.0-RC.3 |
Weakness: CWE-269, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-7phx-w897-4c9x x_refsource_CONFIRM
- https://github.com/chamilo/chamilo-lms/releases/tag/v2.0.0-RC.3 x_refsource_MISC