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CVE-2026-0670

Stored XSS through a system message and a user-provided parameter in ProofreadPage

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - ProofreadPage Extension: 1.45, 1.44, 1.43, 1.39.

CVSS 3.1 · 6.1 Medium EPSS < 1% KEV · Not listed
Vendors
Mediawiki Wikimedia Wikisource
Products
Mediawiki Mediawiki-proofreadpage Extension Proofread Page
CVE-2026-39838

ProofreadPage improperly sanitizes multiline styles using Sanitizer::checkCSS

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.

CVSS 4.0 · 6.9 Medium EPSS < 1% KEV · Not listed
Vendors
Wikimedia
Products
Mediawiki-proofreadpage Extension