Cross-site scripting (XSS) vulnerability in MediaWiki before 1.4.2, when using HTML Tidy ($wgUseTidy), allows remote attackers to inject arbitrary web script or HTML via unknown vectors.
https://exchange.xforce.ibmcloud.com/vulnerabilities/20210
http://www.securityfocus.com/bid/13301
http://sourceforge.net/project/shownotes.php?release_id=322146