The default file type whitelist configuration in conf/mime.conf in the Media Manager in DokuWiki before 2014-09-29b allows remote attackers to execute arbitrary web script or HTML by uploading an SWF file, then accessing it via the media parameter to lib/exe/fetch.php.
http://advisories.mageia.org/MGASA-2014-0540.html
http://seclists.org/oss-sec/2014/q4/1050
https://exchange.xforce.ibmcloud.com/vulnerabilities/99291
https://github.com/splitbrain/dokuwiki/commit/778ddf6f2cd9ed38b9db2d73e823b8c21243a960