CVE-2026-39933
Medium
Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - GlobalWatchlist 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.
SeverityMedium
CVSS6.9
Exploit probability—
ProductMediawiki - GlobalWatchlist Extension
PublishedApr 7, 2026
First seenApr 7, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension1.43 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| The Wikimedia Foundation Mediawiki - GlobalWatchlist Extension | v < 1.43 | 1.43 |
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