The WP Page Builder WordPress plugin through 1.2.8 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/98b2321d-fb66-4e02-9906-63af7b08d647