XSS in Chamilo Chamilo-Lms
CVE-2025-52564
Chamilo is a learning management system. Prior to version 1.11.30, the open parameter of help.php fails to properly sanitize user input. This allows an attacker to inject arbitrary HTML, such as underlined text, via a crafted URL. This issue has been patched in version 1.11.30.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (7.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Chamilo Chamilo-Lms — versions < 1.11.30
- Chamilo Lms
Weakness classification (CWE)
References
- github.com/chamilo/chamilo-lms/security/advisories/GHSA-6fmm-qrx4-wgqc (Vendor Advisory)
- github.com/chamilo/chamilo-lms/commit/083b1d2b0c29b0cc0313a28165ad47bebae9dcb2 (Patch)
- github.com/chamilo/chamilo-lms/commit/1ee2d8bb61b67e08946cd80b1a9b92c1a9959c7b (Patch)
- github.com/chamilo/chamilo-lms/releases/tag/v1.11.30 (Product, Release Notes)
Frequently asked questions
- What is CVE-2025-52564?
- CVE-2025-52564 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.1/10. Published 2026-03-02.
- How severe is CVE-2025-52564?
- Medium severity. CVSS v3 base score is 6.1 out of 10.