The WP Socializer WordPress plugin before 7.3 does not sanitise and escape some of its Icons 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/36a7b872-31fa-4375-9be7-8f787e616ed5