Security Issue reported by iThemes Security plugin

Hello,

the Plugin iThemes-Security reports a security problem with this theme. Here is the message:

Multiple Themes – Reflected Cross-Site Scripting via Customizer Notify

Link to Message Details here:
https://itsec-site-scanner.ithemes.com/vulnerability-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%253D%253D?token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJuYmYiOjE2NTA4OTgyMjksImlhdCI6MTY1MDg5ODIyOSwiZXhwIjoxNjUxNTAzMDI5LCJncmFudCI6Iml0c2VjLXNpdGUtc2Nhbm5lci1tYW5hZ2Utc2NhbiIsInVzZXIiOjJ9.Y-tVuNjjaE-XGrtjwC5BmBulYjs1DLBnG-QfTLmYFic

Do you plan to fix this issue? When?

Regards,

Günther

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