Auth bypass in Chamilo Chamilo-lms
CVE-2026-33715
Chamilo LMS is an open-source learning management system. In version 2.0-RC.2, the file public/main/inc/ajax/install.ajax.php is accessible without authentication on fully installed instances because, unlike other AJAX endpoints, it does n…
Vulnerability class: Broken Authentication
EPSS: 0.002 (37.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
Affected products
- Chamilo Chamilo-lms — versions >= 2.0-RC.2, < 2.0-RC.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-mxc9-9335-45mc (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-2026-33715?
- CVE-2026-33715 is a high-severity vulnerability in Chamilo Chamilo-lms, classified under Missing Authentication for Critical Function. CVSS score: 7.2/10. Published 2026-04-14.
- How severe is CVE-2026-33715?
- High severity. CVSS v3 base score is 7.2 out of 10.
- Is CVE-2026-33715 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.