Hunt Api Misconfig (Grade B) logo

Hunt Api Misconfig (Grade B)Security-tested testing-security skill for Claude AI. Grade B. Hunt API security misconfiguration — mass assignment, JWT attacks, prototype pollution, CORS, HTTP verb tampering. Mass assignment: send

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Daniel NikulshynReviewed by Daniel Nikulshyn·Updated July 2026

Overview

Hunt API security misconfiguration, including mass assignment, JWT attacks, prototype pollution, and HTTP verb tampering. This skill helps identify vulnerabilities such as mass assignment, where an attacker can send a request with extra fields like {is_admin:true, role:admin, verified:true} and the server blindly applies them. It also covers JWT attacks like using alg=none, weak HMAC bruteforce, kid path traversal, JWK injection, and token confusion. Prototype pollution is another area of focus, where __proto__ injection in JSON merge / Object.assign / lodash _.merge can pollute the prototype and lead to RCE in Node or XSS in the browser. Additionally, it looks at HTTP verb tampering, including GET-bypass-CSRF, X-HTTP-Method-Override, and TRACE enabled. Detection methods include looking for API responses with extra fields and JWTs in headers.

Key features

  • Mass assignment detection
  • JWT attack detection
  • Prototype pollution detection
  • HTTP verb tampering detection
  • CORS misconfiguration detection

Pricing

Model
Free
Category
Skills
Rating
No reviews yet

Use cases

Hunting API Misconfigurations

Use this skill to identify and exploit API security misconfigurations, such as mass assignment and JWT attacks, to help secure APIs.

Penetration Testing

Utilize this skill during penetration testing to discover and exploit vulnerabilities in APIs, helping to strengthen security.

Pros & Cons

Pros

  • Comprehensive coverage of API security misconfigurations
  • Detailed examples of potential attacks and detection methods
  • Focus on critical vulnerabilities like mass assignment and JWT attacks

Cons

  • May require advanced knowledge of API security and vulnerabilities
  • Some detection methods may require manual testing and analysis

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Q&A

Are there any limitations?

It may require advanced knowledge of API security and vulnerabilities, and some detection methods may need manual testing and analysis.

Asked by Kenji Watanabe · May 26, 2026

What are the pros of using Hunt Api Misconfig?

It offers comprehensive coverage of API security misconfigurations and detailed examples of potential attacks and detection methods, focusing on critical vulnerabilities.

Asked by Lindiwe Mahlangu · Apr 7, 2026

What features does it have?

Key features include mass assignment detection, JWT attack detection, prototype pollution detection, HTTP verb tampering detection, and CORS misconfiguration detection.

Asked by Ivo Novotný · Feb 19, 2026

What is Hunt Api Misconfig?

Hunt Api Misconfig is a security tool that detects API security misconfigurations, including mass assignment, JWT attacks, and prototype pollution.

Asked by Devin Walker · Feb 14, 2026

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