The Website Content in Page or Post WordPress plugin before 2024.04.09 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/990b7d7a-3d7a-46d5-9aeb-740de817e2d9/