CVE-2025-55289 HIGH

CVE-2025-55289: Chamilo: Stored Cross Site Scripting in Skills Argumentation

Vendor Chamilo
Product chamilo-lms
Weakness CWE-79 · XSS
Published March 6, 2026
Last update March 6, 2026

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

Chamilo is a learning management system. Prior to version 1.11.34, there is a stored XSS vulnerability in Chamilo LMS (Verison 1.11.32) allows an attacker to inject arbitrary JavaScript into the platform’s social network and internal messaging features. When viewed by an authenticated user (including administrators), the payload executes in their browser within the LMS context. This enables full account takeover via session hijacking, unauthorized actions with the victim’s privileges, exfiltration of sensitive data, and potential self-propagation to other users. This issue has been patched in version 1.11.34.

Key dates

02Disclosure timeline

March 6, 2026 CVE published
March 6, 2026 Record updated