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CWE

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CVE-2026-39838

Published: Apr 7, 2026

Modified: Apr 8, 2026

PUBLISHED

Description

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows XSS Targeting Non-Script Elements. The issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.

Vendor	Product	Versions
Wikimedia Foundation	MediaWiki - ProofreadPage Extension	affected `0 - < 1.43` unaffected `1.43` unaffected `1.44` unaffected `1.45`

Weaknesses (CWE)

References

https://phabricator.wikimedia.org/T406088

https://gerrit.wikimedia.org/r/q/Idd51e18479b32b7176b43ff74ca1c49d6bdd0628

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