Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

CVE-2025-59543Chamilo: Account Takeover via Stored XSS in Course Description

Critical 9.1

In plain English

A critical-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 23% of all known vulnerabilities).

Severity (CVSS 3.1)9.1Critical

Exploit odds (30 days)0.3%top 77.0% 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 cross-site scripting (XSS) vulnerability. By injecting malicious JavaScript into the course description field, an attacker with a low-privileged account (e.g., trainer) can execute arbitrary JavaScript code in the context of any other user viewing the course information page, including administrators. This allows an attacker to exfiltrate sensitive session cookies or tokens, resulting in account takeover (ATO) of higher-privileged 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:R/S:C/C:H/I:H/A:H

References

https://github.com/chamilo/chamilo-lms/security/advisories/GHSA-p32q-6gh3-3gcv x_refsource_CONFIRM
https://github.com/chamilo/chamilo-lms/releases/tag/v1.11.34 x_refsource_MISC