Security issue

I keep getting this although the plugin works well.

MyBookTable Bookstore <= 3.3.9 – Cross-Site Request Forgery

• Plugin Name: MyBookTable Bookstore by Stormhill Media
• Current Plugin Version: 3.3.9
• Details: It has unpatched security issues and may have compatibility problems with the current version of WordPress. Get more information.(opens in new tab)
• Plugin URL: https://stormhillmedia.com/all-products/mybooktable/

• This topic was modified 1 year, 9 months ago by stormgrayson.

The page I need help with: [log in to see the link]