Cross-site scripting (XSS) vulnerability in MediaWiki before 1.16.3, when Internet Explorer 6 or earlier is used, allows remote attackers to inject arbitrary web script or HTML via an uploaded file accessed with a dangerous extension such as .html at the end of the query string, in conjunction with a modified URI path that has a %2E sequence in place of the . (dot) character.
lists.fedoraproject.org/pipermail/package-announce/2011-April/058588.html
lists.fedoraproject.org/pipermail/package-announce/2011-April/058910.html
lists.fedoraproject.org/pipermail/package-announce/2011-April/059232.html
lists.fedoraproject.org/pipermail/package-announce/2011-April/059235.html
lists.wikimedia.org/pipermail/mediawiki-announce/2011-April/000096.html
openwall.com/lists/oss-security/2011/04/13/15
secunia.com/advisories/44142
www.debian.org/security/2011/dsa-2366
www.securityfocus.com/bid/47354
www.vupen.com/english/advisories/2011/0978
www.vupen.com/english/advisories/2011/1100
www.vupen.com/english/advisories/2011/1151
bugzilla.redhat.com/show_bug.cgi?id=695577
bugzilla.redhat.com/show_bug.cgi?id=696360
bugzilla.wikimedia.org/show_bug.cgi?id=28235
exchange.xforce.ibmcloud.com/vulnerabilities/66737