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.
http://advisories.mageia.org/MGASA-2014-0438.html
http://secunia.com/advisories/61983
http://www.debian.org/security/2014/dsa-3059
http://www.openwall.com/lists/oss-security/2014/10/13/3
http://www.openwall.com/lists/oss-security/2014/10/16/9