authentication

Identify authentication flow weaknesses and bypass vectors in web applications and APIs.

3|1|Updated May 26, 2026

Search Tags:#authentication #oauth #jwt #mfa #security-testing #captcha #bot-detection

Ready to run

npx skills add https://github.com/LeoWSY-hashblue/-communitytools-custom --skill authentication-leowsy-hashblue

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: authentication
Source: https://github.com/LeoWSY-hashblue/-communitytools-custom/tree/main/skills/authentication
Command: npx skills add https://github.com/LeoWSY-hashblue/-communitytools-custom --skill authentication-leowsy-hashblue

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps security teams rapidly identify authentication weaknesses, bypass paths, and token misconfigurations across web apps and APIs to strengthen access controls.

Core Features & Use Cases

End-to-end auth testing: assess login security, token handling, MFA workflows, CAPTCHA challenges, and bot-detection evasion vectors.
Threat modeling & remediation: produce actionable findings and prioritized mitigations for common auth flaws (JWT/OAuth bypasses, session management gaps, and MFA bypass surfaces).
Use Case: run a pentest on a SaaS portal to uncover a bypass path that allows access without completing MFA and generate a fix plan.

Quick Start

Run a targeted authentication security assessment against your app to identify bypasses, MFA gaps, and token misconfigurations.

Frequently Asked Questions about authentication

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

FAQPage Schema

How do I test for authentication bypasses in web applications and APIs?▼

Authentication bypass testing targets login workflows, token misconfigurations, and MFA pathways to identify access control weaknesses. This approach assesses JWT, OAuth, CAPTCHA, and bot-detection vectors, capturing evidence and generating structured remediation reports for security teams.

What are common JWT and OAuth vulnerabilities to test for during a security assessment?▼

JWT and OAuth testing exposes token misconfigurations, session management gaps, and bypass paths across web apps and APIs. Assessing these authentication flows uncovers authorization weaknesses and produces prioritized mitigations to strengthen access controls.

Can I use this to test MFA bypass vectors and session management gaps?▼

MFA bypass testing evaluates multi-factor authentication workflows to uncover surfaces that allow access without completing verification. Session management gap analysis identifies token handling flaws, capturing evidence and documenting findings suitable for remediation planning.

Does this authentication testing approach work for SaaS portals and API endpoints?▼

Authentication testing applies to SaaS portals and APIs by assessing login security, token handling, and bot-detection evasion vectors across typical workflows. It uncovers bypass paths and generates structured fix plans suitable for security teams.

What's the best way to uncover CAPTCHA and bot-detection evasion vectors?▼

CAPTCHA and bot-detection testing evaluates challenge mechanisms across authentication workflows to identify evasion vectors. This process captures evidence of bypass paths and documents findings with actionable remediation guidance for security teams.