The Weaver Xtreme Theme Support WordPress plugin before 6.2.7 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.
https://wpscan.com/vulnerability/d00824a3-7df5-4b52-a31b-5fdfb19c970f