The Yellow Yard Searchbar WordPress plugin before 2.8.12 does not validate and escape some of its shortcode attributes before outputting them back in a page/post where the shortcode is embed, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks
The Yellow Yard Searchbar WordPress plugin before 2.8.2 does not escape some URL parameters before outputting them back to the user, leading to Reflected Cross-Site Scripting