The ShortPixel Adaptive Images WordPress plugin before 3.6.3 does not sanitise and escape a parameter before outputting it back in the page, leading to a Reflected Cross-Site Scripting which could be used against any high privilege users such as admin
Plugin Settings Update vulnerability in ShortPixel's ShortPixel Adaptive Images plugin <= 3.3.1 at WordPress allows an attacker with a low user role like a subscriber or higher to change the plugin settings.