The Brizy WordPress plugin before 2.8.19 does not properly restrict who can modify its site-global design data and does not sanitise part of that data before outputting it, allowing authenticated us…

Summary

The Brizy WordPress plugin before 2.8.19 does not properly restrict who can modify its site-global design data and does not sanitise part of that data before outputting it, allowing authenticated users with Author-level access and above to store arbitrary JavaScript that is then served unsanitised on the site's front-end pages and executes in the browser of every visitor, including administrators.