CVE-2026-103444 Stored XSS through system messages in WikiForum
Stored XSS in MediaWiki WikiForum allows attackers to inject scripts via system messages, potentially compromising user sessions.
- 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-2026-103444?
CVE-2026-103444 is a low-severity cross-site scripting vulnerability in The Wikimedia Foundation MediaWiki WikiForum extension, published on 30 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki WikiForum extension allows Stored XSS.
This issue affects MediaWiki WikiForum extension: master.
Weakness: CWE-80
Which versions are affected by CVE-2026-103444?
How do I fix CVE-2026-103444?
No fix has been published for CVE-2026-103444 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-2026-103444 being exploited?
There is no known exploitation of CVE-2026-103444 in the wild and no public exploit code.
Sources
Also known as GHSA-wr3h-qfmx-xxrx.