The ZoomSounds - WordPress Wave Audio Player with Playlist plugin for WordPress is vulnerable to Arbitrary File Read in all versions up to, and including, 6.91 via the 'dzsap_download' action. This makes it possible for unauthenticated attackers to read the contents of arbitrary files on the server, which can contain sensitive information.
https://codecanyon.net/item/zoomsounds-wordpress-wave-audio-player-with-playlist/6181433