The WP-chgFontSize WordPress plugin through 1.8 does not have CSRF check in place when updating its settings, which could allow attackers to make a logged in admin change them via a CSRF attack and lead to Stored Cross-Site Scripting due to the lack of sanitisation and escaping
https://wpscan.com/vulnerability/04305e4e-37e3-4f35-bf66-3b79b99d2868