The Hubbub Lite WordPress plugin before 1.34.4 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/b9e2381b-3ea0-48fa-bd9c-4181ddf36389/