Directory traversal vulnerability in download_audio.php in the SE HTML5 Album Audio Player (se-html5-album-audio-player) plugin 1.1.0 and earlier for WordPress allows remote attackers to read arbitrary files via a .. (dot dot) in the file parameter.
https://www.exploit-db.com/exploits/37274/
https://wpvulndb.com/vulnerabilities/8032
https://euvd.enisa.europa.eu/vulnerability/EUVD-2015-4434
http://www.vapid.dhs.org/advisory.php?v=124