The Strong Testimonials WordPress plugin before 3.1.12 does not validate and escape some of its Testimonial fields before outputting them back in a page/post, which could allow users with the contributor role and above to perform Stored Cross-Site Scripting attacks. The attack requires a specific view to be performed
https://wpscan.com/vulnerability/5a0d5922-eefc-48e1-9681-b63e420bb8b3/