CVE-2026-33737 PUBLISHED

Chamilo LMS has an XML External Entity (XXE) Injection

Assigner: GitHub_M
Reserved: 23.03.2026 Published: 10.04.2026 Updated: 10.04.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 5.3

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	None
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	chamilo
Product	chamilo-lms
Versions	Version < 1.11.38 is affected Version >= 2.0.0-alpha.1, < 2.0.0-RC.3 is affected

References

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-c4ww-qgf2-v89j
https://github.com/chamilo/chamilo-lms/commit/22b1cb1c609b643765c88654155aba27070c927e
https://github.com/chamilo/chamilo-lms/commit/af6b7002af7c15825e98fc522e2ead0d00cacaa3

Problem Types

CWE-611: Improper Restriction of XML External Entity Reference CWE