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jwt-oauth-token-attacks

Analyze JWT and OAuth tokens for cryptographic and flow vulnerabilities.

Updated Jun 11, 2026
Search Tags:#security analysis#OAuth#JWT#token security#cryptographic attack
One-click install
npx skills add https://github.com/utsavthakur/agenticskills --skill jwt-oauth-token-attacks-utsavthakur
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: jwt-oauth-token-attacks
Source: https://github.com/utsavthakur/agenticskills/tree/main/jwt-oauth-token-attacks
Command: npx skills add https://github.com/utsavthakur/agenticskills --skill jwt-oauth-token-attacks-utsavthakur

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires python3, jwt_tool, hashcat, john, and includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill provides a comprehensive guide to identifying and exploiting weaknesses in JWT and OAuth token-based security.

Core Features & Use Cases

  • JWT Cryptographic Attacks: Covers algorithm confusion, secret brute force, and key ID injection.
  • OAuth Flow Attacks: Includes CSRF, open redirect, token theft, implicit flow abuse, and scope escalation.
  • Token Leakage: Analyzes Referer header and server log risks for token leakage.
  • Use Case: Security professionals can use this Skill to validate the security of their authentication tokens and OAuth flows.

Quick Start

Load the JWT and OAuth Token Attacks Skill to analyze your authentication token's security.

Frequently Asked Questions about jwt-oauth-token-attacks

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I perform cryptographic attacks on JWT tokens?▼

To perform cryptographic attacks on JWT tokens, you analyze token security using methods like algorithm confusion, secret brute force, and key ID injection to identify vulnerabilities.

What are common OAuth flow vulnerabilities and how do I test for them?▼

Common OAuth flow vulnerabilities include CSRF, open redirect, token theft, implicit flow abuse, and scope escalation. You test for these by analyzing the OAuth flow to validate authentication security.

Do I need jwt_tool and hashcat to analyze token leakage risks?▼

You need jwt_tool, hashcat, and john the Ripper to analyze token leakage risks, as these tools support identifying cryptographic weaknesses and token exposure in Referer headers and server logs.

How does algorithm confusion work in JWT security analysis?▼

Algorithm confusion in JWT security analysis exploits token validation flaws by manipulating the token header to alter cryptographic algorithms, allowing attackers to bypass signature verification mechanisms.

Can I use this approach to brute force JWT secrets?▼

Yes, you can brute force JWT secrets using tools like hashcat and john the Ripper to systematically test cryptographic keys and identify weak secret configurations in token-based security.

What is the best way to identify OAuth token theft and scope escalation?▼

The best way to identify OAuth token theft and scope escalation is to analyze the OAuth flow for open redirects and implicit flow abuse, validating that token scopes are correctly enforced.

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