The Social Sharing Plugin WordPress plugin before 3.3.63 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/1867505f-d112-4919-9fd5-01745aa0433e/