Cross-site scripting (XSS) vulnerability in includes/Sanitizer.php in the variable handler in MediaWiki 1.6.x before r14349 allows remote attackers to inject arbitrary Javascript via unspecified vectors, possibly involving the usage of the | (pipe) character.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26646
http://www.vupen.com/english/advisories/2006/1926
http://svn.wikimedia.org/viewvc/mediawiki?view=rev&revision=14349
http://secunia.com/advisories/20189
http://mail.wikipedia.org/pipermail/wikitech-l/2006-May/035814.html