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Description

The TitleIcon extension for MediaWiki is vulnerable to stored XSS through the #titleicon_unicode parser function. User input passed to this function is wrapped in an HtmlArmor object without sanitization and rendered directly into the page header, allowing attackers to inject arbitrary JavaScript. This issue affects Mediawiki - TitleIcon extension: from 1.39.X before 1.39.13, from 1.42.X before 1.42.7, from 1.43.X before 1.43.2.

PUBLISHED Reserved 2025-07-08 | Published 2025-07-08 | Updated 2025-07-10 | Assigner wikimedia-foundation

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Product status

Default status
unaffected

1.39.x (semver) before 1.39.13
affected

1.42.x (semver) before 1.42.7
affected

1.43.x (semver) before 1.43.2
affected

References

phabricator.wikimedia.org/T394721 exploit

phabricator.wikimedia.org/T394721

gerrit.wikimedia.org/...b638fecbf52b5bec3f02726ed24b1ae74429

gerrit.wikimedia.org/...73445172679634f6ec64d37cf82507dfa110

cve.org (CVE-2025-7363)

nvd.nist.gov (CVE-2025-7363)

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