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JWT Token Spoofing

An attack where attackers forge or manipulate JSON Web Tokens to bypass authentication.

Understanding:


JWT (JSON Web Token) spoofing occurs when attackers forge or manipulate JWTs to bypass authentication and gain unauthorized access.

Common Applications and Use Cases:


  • Bypassing Web Application Authentication – Exploits weak token verification.

  • Privilege Escalation Attacks – Modifies claims to gain higher privileges.

  • API Security Exploits – Targets APIs that rely on JWTs for authorization.

Best Practices and Security Considerations:


  • Use Strong Signing Algorithms (HMAC-SHA256, RSA-256) – Prevents tampering.

  • Implement Token Expiry & Rotation – Reduces risk of token theft.

  • Verify JWT Signatures Properly – Avoids accepting unsigned tokens.

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