The Memberlite Shortcodes WordPress plugin before 1.3.9 does not validate and escape some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as contributor to perform Stored Cross-Site Scripting attacks which could be used against high privilege users such as admin.
https://wpscan.com/vulnerability/a46d686c-6234-4aa8-a656-00a65c55d0b0
https://research.cleantalk.org/cve-2023-5237-memberlite-shortcodes-stored-xss-via-shortcode