The WP QuickLaTeX WordPress plugin before 3.8.8 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/66d0b4b7-cd4b-4ec4-95c0-d50773cb0b8f/