JWT (JSON Web Token) Security Risks: Common Vulnerabilities and Exploits Every Bug Hunter Should…
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Summary
JSON Web Tokens (JWT) are used for authentication and transmitting information between parties securely in JSON format.
They are made up of a header, payload, and signature, and are designed to be tamper-proof while offering the benefits of stateless authentication, making them efficient and suitable for modern applications.
However, there are several vulnerabilities specific to JWT that users should be aware of when implementing them, including:
• iss claim misinterpretation
• expiration time mitigation
• audience compatibility
• secret key storage
• algorithmic collisions
• token replay
It’s important for developers to understand these risks and take steps to mitigate them to ensure the security of JWTs and the applications that use them.