The WP Humans.txt WordPress plugin through 1.0.6 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/2296156e-b177-478e-a01c-b1ea4fee0aca