Auth bypass in Chamilo Chamilo-lms
CVE-2026-40291
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…
Vulnerability class: Privilege Escalation
EPSS: 0.001 (16.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Chamilo Chamilo-lms — versions < 2.0-RC.3
Weakness classification (CWE)
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)
Frequently asked questions
- What is CVE-2026-40291?
- CVE-2026-40291 is a high-severity vulnerability in Chamilo Chamilo-lms, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-04-14.
- How severe is CVE-2026-40291?
- High severity. CVSS v3 base score is 8.8 out of 10.