CVE-2025-52564 Chamilo: HTML injection via open parameter

Medium 6.9 Published 2 Mar 2026 Updated 2 Mar 2026

Attackers can inject arbitrary HTML into Chamilo LMS via the open parameter in help.php, potentially leading to script execution.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2025-52564?

CVE-2025-52564 is a medium-severity cross-site scripting vulnerability in Chamilo Chamilo Lms, published on 2 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

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.

Weakness: CWE-80

Which versions are affected by CVE-2025-52564?

It affects 1 product.

Products include Chamilo Chamilo Lms.

How do I fix CVE-2025-52564?

No fix has been published for CVE-2025-52564 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-2025-52564 being exploited?

There is no known exploitation of CVE-2025-52564 in the wild and no public exploit code.

All Chamilo Chamilo Lms vulnerabilities

Sources

Also known as GHSA-6fmm-qrx4-wgqc.