Doppler: Acquisition on broken link listed on the page "https://docs.doppler.com/docs/removal-deprecated-packages-scripts in [scheduling a call]

Summary:

Docs doppler has an unclaimed broken link on its doc page which can be claimed by any malicious user.

Steps to reproduce:

1.Visit https://docs.doppler.com/docs/removal-deprecated-packages-scripts
2.Click on scheduling a call.
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3. The scheduling a call page points to https://calendly.com/doppler-ryan/onsite-install , but the URL gives 404.

4.So, I impersonated his identity by forming a fake account called ‘Page Acquisition by Joao Gomes’ at this link. Here, just for PoC purposes, I assumed the broken link by creating an account with this name doppler-ryan

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Reference: https://hackerone.com/reports/2399386

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Impact

The product violates well-established principles for safe design.

A malicious user can create a fake account on that broken redirect link and trick users who arrive at that link.