Themify Portfolio Post WordPress plugin before 1.2.1 does not validate and escapes some of its shortcode attributes before outputting them back in the page, which could allow users with a role as low as a contributor to perform Stored Cross-Site Scripting attacks, which could be used against high privileged users such as admin.
https://wpscan.com/vulnerability/1d3636c1-976f-4c84-8cca-413e38170d0c