CVE-2025-50186 Chamilo: Stored XSS via Malicious CSV Filename in user_import.php
Attackers can execute arbitrary JavaScript in victim browsers by uploading maliciously named CSV files, potentially leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-50186?
CVE-2025-50186 is a medium-severity cross-site scripting vulnerability in Chamilo Chamilo Lms, published on 2 Mar 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-79
Which versions are affected by CVE-2025-50186?
It affects 1 product.
Products include Chamilo Chamilo Lms.
How do I fix CVE-2025-50186?
No fix has been published for CVE-2025-50186 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-50186 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-50186 exists.
Other vulnerabilities in Chamilo Chamilo Lms
Sources
Also known as GHSA-wrx6-5v5r-mmgx.