CVE-2026-33705: Chamilo LMS has unauthenticated access to Twig template source files exposes application logic

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-10 · updated 2026-10-26
Weakness: CWE-538

Description

Chamilo LMS is a learning management system. Prior to 1.11.38, Twig template files (.tpl) under /main/template/default/ are directly accessible without authentication via HTTP GET requests. These templates expose internal application logic, variable names, AJAX endpoint URLs, and admin panel structure. This vulnerability is fixed in 1.11.38.

Affected products

chamilo-lms: before 1.11.38 — fixed in 1.11.38

How to fix

Upgrade to a fixed version: chamilo-lms 1.11.38. Check the vendor advisory for mitigations.

References

https://github.com/chamilo/chamilo-lms/commit/4efb5ee8ed849ca147ca1fe7472ef7b98db17bff
https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-5wjg-8x28-px57

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