Bug 2279233 (CVE-2024-34500)

Summary:	CVE-2024-34500 mediawiki: XSS through interface message in UnlinkedWikibase
Product:	[Other] Security Response	Reporter:	Avinash Hanwate <ahanwate>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	Keywords:	Security
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Hardware:	All
OS:	Linux
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Bug Depends On:	2279234
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Description Avinash Hanwate 2024-05-06 04:02:00 UTC

An issue was discovered in the UnlinkedWikibase extension in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1. XSS can occur through an interface message. Error messages (in the $err var) are not escaped before being passed to Html::rawElement() in the getError() function in the Hooks class.

https://gerrit.wikimedia.org/r/c/mediawiki/extensions/UnlinkedWikibase/+/1002175
https://phabricator.wikimedia.org/T357203

Comment 1 Avinash Hanwate 2024-05-06 04:02:15 UTC

Created mediawiki tracking bugs for this issue:

Affects: fedora-all [bug 2279234]