The Sliderby10Web WordPress plugin before 1.2.53 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/96818024-57ab-419d-bd46-7d2da98269e6