Timed Content < 2.73 - 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.

[timed-content-client hide="10:00:' onmouseover='alert(1)'"]XSS[/timed-content-client]