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/fd53e40a-516b-47b9-b495-321774432367/