Cross-site scripting in Chamilo LMS - CVE-2025-55289
Published: April 24, 2026
Vulnerability identifier: #VU127544
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear
CVE-ID: CVE-2025-55289
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Chamilo
Affected software:
Chamilo LMS
Chamilo LMS
Detailed vulnerability description
The vulnerability allows a remote user to execute arbitrary JavaScript in a victim's browser and compromise accounts.
The vulnerability exists due to cross-site scripting in the skill management argumentation parameter when processing user-supplied input. A remote user can submit a specially crafted argumentation value to execute arbitrary JavaScript in a victim's browser and compromise accounts.
The payload executes when viewed by an authenticated user, including administrators, within the LMS context.
How to mitigate CVE-2025-55289
Install security update from vendor's website.