CVE-2026-22711 Stored XSS through system messages in WikiLove
Stored XSS in MediaWiki WikiLove extension allows attackers to inject scripts via system messages, potentially compromising user sessions.
- 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-2026-22711?
CVE-2026-22711 is a medium-severity cross-site scripting vulnerability in The Wikimedia Foundation Mediawiki - Wikilove Extension, published on 7 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Improper neutralization of alternate XSS syntax vulnerability in The Wikimedia Foundation Mediawiki - Wikilove Extension allows Cross-Site Scripting (XSS).The issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.
Weakness: CWE-87
Which versions are affected by CVE-2026-22711?
How do I fix CVE-2026-22711?
No fix has been published for CVE-2026-22711 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-2026-22711 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-22711 exists.
Sources
Also known as GHSA-cp48-9xx4-pmj6.