The ajax_mediadiff function in DokuWiki before 2014-05-05a allows remote attackers to access arbitrary images via a crafted namespace in the ns parameter.
https://github.com/splitbrain/dokuwiki/issues/765
http://www.securityfocus.com/bid/70404
http://www.openwall.com/lists/oss-security/2014/10/16/9
http://www.openwall.com/lists/oss-security/2014/10/13/3
http://www.debian.org/security/2014/dsa-3059