The WP Social Sharing WordPress plugin through 2.2 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/ba372400-96f7-45a9-9e89-5984ecc4d1e2