CVE-2025-59540 PUBLISHED

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

Assigner: GitHub_M
Reserved: 17.09.2025 Published: 06.03.2026 Updated: 06.03.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
CVSS Score: 6.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	High
Attack Complexity	Low	Integrity	None	Integrity	High
Attack Requirements	None	Availability	None	Availability	High
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	chamilo
Product	chamilo-lms
Versions	Version < 1.11.34 is affected

References

Problem Types

CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) CWE
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE