The WP QuickLaTeX WordPress plugin before 3.8.7 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/dcddc2de-c32c-4f8c-8490-f3d980b05822/