The WP ULike WordPress plugin before 4.7.1 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/019b3f34-7b85-4728-8dd7-ca472d6b2d06/