OAuth phishing
A real login (2FA works, correct URL and design) authorizing a fake "Google Docs" app.
Revoke: https://myaccount.google.com/permissions pic.twitter.com/4mGgu2vDTg
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But this shouldn't be something you can click through. There should be no way to auth an email client without first going in GMail Settings.
Auth initiated by the app that wants it, rather than by explicit user action initiated in existing trusted context, is ASKING FOR PHISHING.
OAuth is a valid protocol to demonstrate your identity to 3rd-party apps. It's NOT a valid protocol for giving 3rd-party apps access to acct
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