Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

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

High 8.8

In plain English

A high-severity cross-site scripting in chamilo-lms from chamilo. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.3%top 71.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
chamilo	chamilo-lms	< 1.11.34

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-cchj-3qmf-82j5 x_refsource_CONFIRM
https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34 x_refsource_MISC