The issue is already fixed in Types 3.4.18 (it may take a while for the security notices to catch up).
If the update does not show up on your plugin installer page (click the registered link beneath the plugin name to go to the custom installer page) click the the Check for Updates button to update the list.
Hi Nigel. Thanks a lot for the fast reply. I will be off to a week of cycling abroad. So good to be able to sleep well 🙂
Hope all is well. Cheers. Heimo