What’s Vulnerable › Vulnerabilities

CVE-2025-59540: Chamilo: Stored Cross-Site Scripting (XSS) in Chamilo LMS Exercise Feedback

• Severity: medium (CVSS 5.4 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: 2026-03-06 · updated 2026-06-17
• Weakness: CWE-79

Description

Chamilo is a learning management system. Prior to version 1.11.34, a stored XSS vulnerability exists in Chamilo LMS that allows a staff account to execute arbitrary JavaScript in the browser of higher-privileged admin users. The issue arises because feedback input in the exercise history page is not properly encoded before rendering, allowing malicious scripts to persist in the database and execute on view. This issue has been patched in version 1.11.34.

Affected products

• chamilo-lms: before 1.11.34 — fixed in 1.11.34

How to fix

Upgrade to a fixed version: chamilo-lms 1.11.34. Check the vendor advisory for mitigations.

References

• https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34
• https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-59h4-34mx-m67m

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