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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.
Reserved 2024-05-05 | Published 2024-05-05 | Updated 2024-12-04 | Assigner mitrephabricator.wikimedia.org/T357203
gerrit.wikimedia.org/...xtensions/UnlinkedWikibase/+/1002175
lists.fedoraproject.org/...FU2FGUXXK6TMV6R52VRECLC6XCSQQISY/ (FEDORA-2024-2c564b942d)
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