CVE-2021-31933: Chamilo

High severity, CVSS 7.2. EPSS: 13.9% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in Chamilo through 1.11.14 due to improper input sanitization of a parameter used for file uploads, and improper file-extension filtering for certain filenames (e.g., .phar or .pht). A remote authenticated administrator is able to upload a file containing arbitrary PHP code into specific directories via main/inc/lib/fileUpload.lib.php directory traversal to achieve PHP code execution.

Affected products

• Chamilo Chamilo: up to and including 1.11.14

Published 2021-04-30. Last modified 2026-06-17.