The Zoomsounds plugin <= 6.45 for WordPress allows arbitrary files, including sensitive configuration files such as wp-config.php, to be downloaded via the `dzsap_download` action using directory traversal in the `link` parameter.
https://www.wordfence.com/vulnerability-advisories/#CVE-2021-39316
http://packetstormsecurity.com/files/165146/WordPress-DZS-Zoomsounds-6.45-Arbitrary-File-Read.html