Cross-site scripting (XSS) vulnerability in usersettings.php in WikkaWiki (Wikka Wiki) before 1.1.6.3 allows remote attackers to inject arbitrary web script or HTML via the name parameter.
http://www.vupen.com/english/advisories/2007/1725
http://www.securityfocus.com/bid/23894
http://wush.net/trac/wikka/ticket/363
http://wikkawiki.org/WikkaReleaseNotes