XXE in Chamilo Chamilo-Lms
CVE-2026-33737
Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, multiple files use simplexml_load_string() without XXE protection. With LIBXML_NOENT flag, arbitrary server files can be read. This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.
Vulnerability class: XXE (XML External Entity)
EPSS: 0.002 (12.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Chamilo Chamilo-lms — versions < 1.11.38, >= 2.0.0-alpha.1, < 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)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-33737?
- CVE-2026-33737 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.3/10. Published 2026-04-10.
- How severe is CVE-2026-33737?
- Medium severity. CVSS v3 base score is 5.3 out of 10.