The FooGallery WordPress plugin before 2.4.15, foogallery-premium WordPress plugin before 2.4.15 does not validate and escape some of its Gallery settings before outputting them back in the page, which could allow users with a role as low as Author to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admin
In the Best Image Gallery & Responsive Photo Gallery – FooGallery WordPress plugin before 2.0.35, the Custom CSS field of each gallery is not properly sanitised or validated before being being output in the page where the gallery is embed, leading to a stored Cross-Site Scripting issue.
The FooGallery plugin 1.8.12 for WordPress allow XSS via the posttitle parameter.