Auth bypass in Chamilo Chamilo-Lms
CVE-2026-33141
Chamilo LMS is a learning management system. Prior to 2.0.0-RC.3, an Insecure Direct Object Reference (IDOR) vulnerability in the REST API stats endpoint allows any authenticated user (including low-privilege students with ROLE_USER) to read any other user's learning progress, certificates, and gradebook scores for any course, without enrollment or supervisory relationship. This vulnerability is fixed in 2.0.0-RC.3.
Vulnerability class: IDOR (Insecure Direct Object Reference)
EPSS: 0.001 (3.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Chamilo Chamilo-lms — versions < 2.0.0-RC.3
- Chamilo Chamilo_lms — versions 2.0.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33141?
- CVE-2026-33141 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-04-10.
- How severe is CVE-2026-33141?
- Medium severity. CVSS v3 base score is 6.5 out of 10.