The Sticky Social Icons WordPress plugin through 1.2.1 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/cd1aea4a-e5a6-4f87-805d-459b293bbf28/