CVE-2025-6594 XSS in Special:ApiSandbox
An attacker can execute arbitrary scripts in the API Sandbox interface, potentially compromising user sessions or data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-6594?
CVE-2025-6594 is a cross-site scripting vulnerability in Wikimedia Foundation MediaWiki, published on 2 Feb 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Special.Apisandbox/ApiSandbox.Js.
This issue affects MediaWiki: from 1.27.0 before 1.39.13, 1.42.7 1.43.2, 1.44.0.
Weakness: CWE-79
Which versions are affected by CVE-2025-6594?
How do I fix CVE-2025-6594?
Upgrade to a fixed version.
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-2025-6594 being exploited?
There is no known exploitation of CVE-2025-6594 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-6594, GHSA-f8f3-5c83-vh78, UBUNTU-CVE-2025-6594.