hunt-mfa-bypass

Identify and classify MFA/2FA bypass patterns in web application authentication workflows.

Updated May 31, 2026
One-click install
npx skills add https://github.com/grivera82/pi-bughunter --skill hunt-mfa-bypass-grivera82
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: hunt-mfa-bypass
Source: https://github.com/grivera82/pi-bughunter/tree/main/skills/hunt-mfa-bypass
Command: npx skills add https://github.com/grivera82/pi-bughunter --skill hunt-mfa-bypass-grivera82

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

MFA and 2FA bypass patterns enable unauthorized access by exploiting gaps in login and post-auth workflows. This skill helps defenders and red teams systematically identify, classify, and mitigate MFA weaknesses across web applications. It guides testers to map flow state transitions, verify token handling, and document evidence for remediation.

Core Features & Use Cases

  • Pattern-driven MFA bypass assessment across login workflows.
  • Evidence collection and mitigations for rate limits, OTP handling, and remember-me flows.
  • Use Case: validate a hypothetical app with pre-MFA cookies and OTP verification weaknesses to illustrate risk.

Quick Start

Run a controlled MFA-bypass assessment on a target application and document observed bypass patterns.

Frequently Asked Questions about hunt-mfa-bypass

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

FAQPage Schema
How do I identify MFA bypass vulnerabilities in web applications?

To test for 2FA bypass patterns, you map login flow state transitions, verify OTP token handling, and check for missing rate limits. This process detects bypass opportunities like OTP reuse and insecure pre-MFA states.

What are common MFA bypass patterns in login workflows?

Common MFA bypass patterns include OTP reuse, lack of rate limiting on verification endpoints, and insecure remember-me scenarios. Attackers exploit gaps in post-login workflows and pre-MFA states to authenticate without proper challenge.

How do I perform a safe red-team assessment for 2FA bypasses?

A safe red-team 2FA bypass assessment requires outlining observable indicators, collecting evidence, and applying explicit checks for rate limits, session handling, and credential protection. Recommended mitigations must be documented during the engagement.

Can I use this MFA bypass testing method on modern web apps with remember-me features?

Yes, this MFA bypass testing method applies across modern web apps and specifically evaluates remember-me scenarios. It detects authentication bypass opportunities by analyzing pre-MFA cookies and post-login workflow states.

Why does MFA fail to prevent unauthorized access in some web applications?

MFA fails to prevent unauthorized access when applications have gaps in login and post-auth workflows. Weaknesses like OTP reuse, missing rate limits, and improper session handling allow attackers to bypass the authentication challenge.