The OAuth extension for MediaWiki improperly negotiates a new client token only over Special:OAuth/initiate, which allows attackers to bypass intended IP address access restrictions by making an API request with an existing token.
https://phabricator.wikimedia.org/T103022
https://lists.wikimedia.org/pipermail/mediawiki-announce/2015-October/000182.html
https://bugzilla.redhat.com/show_bug.cgi?id=1273353
http://www.securitytracker.com/id/1034028
http://www.securityfocus.com/bid/77379
http://www.openwall.com/lists/oss-security/2015/10/29/14
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171007.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170979.html
http://lists.fedoraproject.org/pipermail/package-announce/2015-November/170961.html