CVE-2025-55208: Chamilo Lms

Critical severity, CVSS 9.0. EPSS: 0.3% chance of exploitation in the next 30 days.

Chamilo is a learning management system. Versions prior to 1.11.34 have a Stored XSS through insecure file uploads in `Social Networks`. Through it, a low-privilege user can execute arbitrary code in the admin user inbox, allowing takeover of the admin account. Version 1.11.34 fixes the issue.

Affected products

• Chamilo Chamilo Lms: before 1.11.34 (fixed in 1.11.34)

Published 2026-03-05. Last modified 2026-06-17.