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by melville_X 4438 days ago
From the Q&A:

> Covert Redirect is based on vulnerability Open Redirect. An open redirect is an application that takes a parameter and redirects a user to the parameter value without any validation (OWASP). So Covert Redirect is an applicaiton that takes a paramter and redirects a user to the parameter value with improper validation. Usually this is the of result of overconfidence of its partnership.

Seems like a known flaw in OAuth2.