The We’re Open! WordPress plugin before 1.42 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/11c89925-4fe9-45f7-9020-55fe7bbae3db