The WP ULike WordPress plugin before 4.7.6 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/e21f6a4e-f385-411b-8d91-0f38f9e6cdd3/