CVE-2026-32893 Chamilo LMS has Reflected XSS via Unsanitized http_build_query() in Exercise Question List Pagination
An attacker can execute arbitrary JavaScript in an authenticated teacher's browser via unsanitized pagination parameters in Chamilo LMS.
- 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-2026-32893?
CVE-2026-32893 is a medium-severity cross-site scripting vulnerability in Chamilo Chamilo Lms, published on 10 Apr 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 LMS is a learning management system. Prior to 2.0.0-RC.3, a Reflected Cross-Site Scripting (XSS) vulnerability in the exercise question list admin panel allows an attacker to execute arbitrary JavaScript in an authenticated teacher's browser. The pagination code merges all $_GET parameters via array_merge() and outputs the result via http_build_query() directly into HTML href attributes without htmlspecialchars() encoding. This vulnerability is fixed in 2.0.0-RC.3.
Weakness: CWE-79
Which versions are affected by CVE-2026-32893?
It affects 1 product.
Products include Chamilo Chamilo Lms.
How do I fix CVE-2026-32893?
No fix has been published for CVE-2026-32893 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-2026-32893 being exploited?
There is no known exploitation of CVE-2026-32893 in the wild and no public exploit code.
Other vulnerabilities in Chamilo Chamilo Lms
Sources
Also known as GHSA-37jh-g64j-88mc.