CVE-2026-22711: Stored XSS through system messages in WikiLove

Severity: medium (CVSS 6.9 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-07 · updated 2026-07-21
Weakness: CWE-87

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.

Affected products

The Wikimedia Foundation Mediawiki - Wikilove Extension: before 1.43 — fixed in 1.43

How to fix

Upgrade to a fixed version: The Wikimedia Foundation Mediawiki - Wikilove Extension 1.43. Check the vendor advisory for mitigations.

References

https://gerrit.wikimedia.org/r/q/Iab86209478a044504f5a6aea0d8c3d14f21c48b3
https://phabricator.wikimedia.org/T416502

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