The Simple Posts Ticker WordPress plugin before 1.1.6 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/e9b9a594-c960-4692-823e-23fc60cca7e7