Hello, @Kevin,
Thanks for your contact.
I have just checked your provided explanation and screenshot and found that the issue and vulnerability are not because of our theme but that is because of the plugin: https://wordpress.org/plugins/customizer-export-import/ so please try to deactivate that plugin and check back and if that will resolve your issue then please try to reach our to the plugin support for this concern, they will check and help you out.
Thanks for your understanding.
Regards 8Themes Team.