Core Plugin for Kitestudio Themes < 2.3.1 - Reflected Cross-Site-Scripting

The core plugin for kitestudio WordPress plugin before 2.3.1 does not sanitise and escape some parameters before outputting them back in a response of an AJAX action, available to both unauthenticated and authenticated users when a premium theme from the vendor is active, leading to a Reflected Cross-Site Scripting.