The DN Footer Contacts WordPress plugin before 1.6.3 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/e2067637-45f3-4b42-96ca-85867c4c0409/