WPaudio MP3 Player <= 4.0.2 - Contributor+ Stored XSS

The plugin 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.

[wpaudio url="' onmouseover='alert(/XSS/)'"]