The Fancy Product Designer WordPress plugin before 6.1.81 does not sanitise and escape some of its settings, which could allow high privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
https://wpscan.com/vulnerability/baf4afc9-c20e-47d6-a798-75e15652d1e3/