Cross-site scripting (XSS) vulnerability in MediaWiki before 1.19.19, 1.22.x before 1.22.11, and 1.23.x before 1.23.4 allows remote attackers to inject arbitrary web script or HTML via a crafted SVG file.
https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-September/000161.html
https://gerrit.wikimedia.org/r/#/c/162777/
https://bugzilla.wikimedia.org/show_bug.cgi?id=69008
http://www.openwall.com/lists/oss-security/2014/09/27/2