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.
Metrics
Affected Vendors & Products
References
History
Wed, 08 Apr 2026 19:45:00 +0000
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| First Time appeared |
Wikimedia
Wikimedia mediawiki-proofreadpage Extension |
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| Vendors & Products |
Wikimedia
Wikimedia mediawiki-proofreadpage Extension |
Wed, 08 Apr 2026 19:15:00 +0000
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| 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.This issue affects . | 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. |
Tue, 07 Apr 2026 21:15:00 +0000
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| Metrics |
ssvc
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Tue, 07 Apr 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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.This issue affects . | |
| Title | ProofreadPage improperly sanitizes multiline styles using Sanitizer::checkCSS | |
| Weaknesses | CWE-79 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: wikimedia-foundation
Published: 2026-04-07T19:17:51.638Z
Updated: 2026-04-08T18:48:41.035Z
Reserved: 2026-04-07T18:21:12.573Z
Link: CVE-2026-39838
Updated: 2026-04-07T20:40:11.397Z
Status : Awaiting Analysis
Published: 2026-04-07T20:16:33.477
Modified: 2026-04-08T21:27:00.663
Link: CVE-2026-39838
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