Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS) vulnerability in bPlugins Html5 Audio Player allows Stored XSS. This issue affects Html5 Audio Player: from n/a through 2.2.28.

The Html5 Audio Player – Audio Player for WordPress plugin before 2.1.3 does not sanitise or validate the parameters from its shortcode, allowing users with a role as low as contributor to set Cross-Site Scripting payload in them which will be triggered in the page/s with the embed malicious shortcode

The Html5 Audio Player WordPress plugin before 2.1.12 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks.