The GDPR Cookie Compliance WordPress plugin before 4.15.9 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/2f4a402a-97f6-4638-9ce0-456ccd5606e9/