What is redirect URI validation in OAuth 2.0?

What is redirect URI validation in OAuth 2.0?

Redirect URI validation is a security measure in OAuth 2.0 that ensures the redirect URI provided by the client matches the one registered with the authorization server.

Why is it important to validate the redirect URI?

Validating the redirect URI prevents attacks such as open redirect vulnerabilities, ensuring that authorization codes are sent to trusted locations.

How can I implement redirect URI validation?

You can implement it by checking the redirect URI against a whitelist of registered URIs before processing the authorization request.

What happens if the redirect URI doesn't match?

If the redirect URI doesn't match, the authorization server will reject the request, preventing potential security risks.