Salon booking system <= 9.6.5 - Editor+ Stored XSS via Email Settings

The Salon booking system WordPress plugin through 9.6.5 does not sanitise and escape some of its settings, which could allow high privilege users such as admin (or editor depending on Salon booking system WordPress plugin through 9.6.5 configuration) to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)