The WP ULike WordPress plugin before 4.7.4 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/9166cf91-69e5-4786-a6a9-816db7d47b07/