The WP Shortcodes Plugin — Shortcodes Ultimate WordPress plugin before 7.0.5 does not properly escape some of its shortcodes attributes before they are echoed back to users, making it possible for users with the contributor role to conduct Stored XSS attacks.
https://wpscan.com/vulnerability/98d8c713-e8cd-4fad-a8fb-7a40db2742a2/