What is CVE-2025-50186?

CVE-2025-50186 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-03-02.

How severe is CVE-2025-50186?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Chamilo Chamilo-Lms

CVE-2025-50186

Chamilo is a learning management system. Prior to version 1.11.30, a stored cross-site scripting (XSS) vulnerability exists due to insufficient sanitization of CSV filenames. An attacker can upload a maliciously named CSV file (e.g., <img src=q onerror=prompt(8)>.csv) that leads to JavaScript execution when viewed by administrators or users with access to import logs or file views. This issue has been patched in version 1.11.30.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-03-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (19.9th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.9% 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 < 1.11.30
Chamilo Lms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/chamilo/chamilo-lms/security/advisories/GHSA-wrx6-5v5r-mmgx (Exploit, Vendor Advisory)
github.com/chamilo/chamilo-lms/commit/9fef8f30b41d586cb4f4fc823906c16a12ae0ff4 (Patch)
github.com/chamilo/chamilo-lms/releases/tag/v1.11.30 (Product, Release Notes)

Frequently asked questions

What is CVE-2025-50186?: CVE-2025-50186 is a medium-severity vulnerability in Chamilo Chamilo-Lms, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-03-02.
How severe is CVE-2025-50186?: Medium severity. CVSS v3 base score is 4.8 out of 10.