The IDonate WordPress plugin through 1.9.0 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/7a8a834a-e5d7-4678-9d35-4390d1200437/