OAuth is that smooth sign-in button you love — “Log in with Google”, “Continue with Microsoft”. But attackers love it too… for the wrong reasons.

Here’s the play:
If an app’s OAuth flow isn’t locked down, an attacker can:

• Trick users into authorizing malicious apps
• Steal tokens and hijack sessions
• Chain OAuth abuse with phishing for full account takeover

The scary part? No password needed. OAuth trust does the dirty work.

Defensive moves:

• Always validate redirect URIs
• Don’t allow wildcard domains
• Limit scopes and revoke unused tokens
• Educate users — they shouldn't just click “Allow” on anything shiny

OAuth isn’t broken — but misconfigurations and blind trust make it abusable.
And attackers know exactly where to look.

— Cyber Protection Academy dropping real-world exploit game