CVE-2026-39838
ProofreadPage improperly sanitizes multiline styles using Sanitizer::checkCSS
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
15th
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.
| CWE | CWE-79 |
| Vendor | wikimedia foundation |
| Product | mediawiki - proofreadpage extension |
| Published | Apr 7, 2026 |
| Last Updated | Apr 8, 2026 |
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Affected Versions
Wikimedia Foundation / MediaWiki - ProofreadPage Extension
0 < 1.43
References
Credits
SomeRandomDeveloper