The Auto Prune Posts WordPress plugin before 3.0.0 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/efab3a36-535b-40ff-b98f-482a0e5193f1/