The Ajax Search Lite WordPress plugin before 4.12.5 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/270f213a-2fde-471c-ad09-2b44d11891ec/