The Responsive Pricing Table WordPress plugin before 5.1.11 does not validate and escape some of its Pricing Table options before outputting them back in a page/post where the related shortcode is embed, which could allow users with the author role and above to perform Stored Cross-Site Scripting attacks
https://wpscan.com/vulnerability/30546402-03b8-4e18-ad7e-04a6b556ffd7/