CVE-2025-55208 Chamilo LMS has Stored Cross Site Scripting on Social Networks Uploaded Files
A stored XSS vulnerability in Chamilo LMS allows low-privilege users to execute arbitrary code in admin inboxes, leading to account takeover.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-55208?
CVE-2025-55208 is a critical cross-site scripting vulnerability in Chamilo Chamilo Lms, published on 5 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Chamilo is a learning management system. Versions prior to 1.11.34 have a Stored XSS through insecure file uploads in `Social Networks`. Through it, a low-privilege user can execute arbitrary code in the admin user inbox, allowing takeover of the admin account. Version 1.11.34 fixes the issue.
Weakness: CWE-79
Which versions are affected by CVE-2025-55208?
It affects 1 product.
Products include Chamilo Chamilo Lms.
How do I fix CVE-2025-55208?
No fix has been published for CVE-2025-55208 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-2025-55208 being exploited?
There is no known exploitation of CVE-2025-55208 in the wild and no public exploit code.
Other vulnerabilities in Chamilo Chamilo Lms
Sources
Also known as GHSA-2vq2-826h-6hp6.