XSS in Chamilo Chamilo-Lms
CVE-2025-59543
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (15.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Chamilo Chamilo-Lms — versions < 1.11.34
- Chamilo Lms
Weakness classification (CWE)
References
- github.com/chamilo/chamilo-lms/security/advisories/GHSA-p32q-6gh3-3gcv (Vendor Advisory)
- github.com/chamilo/chamilo-lms/releases/tag/v1.11.34 (Product, Release Notes)
Frequently asked questions
- What is CVE-2025-59543?
- CVE-2025-59543 is a critical-severity vulnerability in Chamilo Chamilo-Lms, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-03-06.
- How severe is CVE-2025-59543?
- Critical severity. CVSS v3 base score is 9.0 out of 10.