Deactivate and delete. No reply from the vendor.
Bhuvanesh Jayaprakash discovered and reported this Cross Site Scripting (XSS) vulnerability in WordPress Admin side data storage for Contact Form 7 Plugin. This could allow a malicious actor to inject malicious scripts, such as redirects, advertisements, and other HTML payloads into your website which will be executed when guests visit your site. This vulnerability has not been known to be fixed yet.