The WP STAGING WordPress Backup Plugin WordPress plugin before 3.4.0, wp-staging-pro WordPress plugin before 5.4.0 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/a4152818-1e07-46a7-aec4-70f1a1b579a6/