The Image Hover Effects WordPress plugin before 5.5 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/bed8c81c-04c7-412d-9563-ce4eb64b7754