There’s a recaptcha plugin available on the Marketplace at https://marketplace.mendix.com/link/component/115762, I’ve been using it recently for a form I’ve been building – it comes with a usage example that can be copied to set up what you need.
Hi,
You can drop a nice email to the developer of the widget , as per my experience and in most case, they can help you by upgrading and releasing to latest version.
Next is build your own solution .
Hope this helps.
Cheers