Easy Social Feed – Social Photos Gallery – Post Feed – Like Box < 6.4.0 - Contributor+ Stored XSS

The plugin does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admin.

PoC

Exploit shortcode: [my-instagram-feed wrapper_class=‘" onmouseover=“alert(1)”’]