2fa-bypass

Bypasses two-factor authentication during authorized penetration tests.

253|37|Updated Feb 22, 2026
One-click install
npx skills add https://github.com/blacklanternsecurity/red-run --skill 2fa-bypass
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: 2fa-bypass
Source: https://github.com/blacklanternsecurity/red-run/tree/main/skills/web/2fa-bypass
Command: npx skills add https://github.com/blacklanternsecurity/red-run --skill 2fa-bypass

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

This Skill helps penetration testers bypass two-factor authentication (2FA/MFA) on target applications, enabling access without valid second-factor codes.

Core Features & Use Cases

  • 2FA Flow Analysis: Identifies the type of 2FA and its verification endpoint.
  • Response Manipulation: Tests for vulnerabilities by altering HTTP responses to bypass validation.
  • Direct Navigation Bypass: Attempts to access authenticated pages directly without completing 2FA.
  • Brute-Force Attacks: Includes methods for OTP and backup code brute-forcing, with rate-limit bypass techniques.
  • Use Case: A penetration tester has successfully authenticated with a username and password but is blocked by a 2FA prompt. This skill guides them through various techniques to bypass the 2FA and gain access to the account.

Quick Start

Use the 2fa-bypass skill to test for bypass techniques against the target URL 'https://example.com'.

Frequently Asked Questions about 2fa-bypass

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

FAQPage Schema
How do I bypass two-factor authentication during a penetration test?

Bypass 2FA during authorized penetration testing by analyzing 2FA flows, manipulating HTTP responses, attempting direct navigation to authenticated pages, and brute-forcing OTP or backup codes.

What techniques work for MFA bypass when I have valid user credentials?

MFA bypass with valid credentials involves altering HTTP verification responses, navigating directly to authenticated endpoints without completing 2FA, and brute-forcing OTPs with rate-limit bypass techniques.

Can I brute force 2FA OTP codes if the target application has rate limiting?

Brute-forcing 2FA OTP codes against rate-limited applications requires applying rate-limit bypass techniques while systematically guessing OTP and backup code values during authorized testing.

How does response manipulation help with authentication bypass testing?

Response manipulation achieves authentication bypass by intercepting and altering HTTP responses from 2FA verification endpoints to trick the application into validating incomplete or incorrect second-factor submissions.

Does direct navigation bypass work for all 2FA implementations?

Direct navigation bypass only works on flawed 2FA implementations that fail to enforce server-side session validation, allowing testers to access authenticated pages without completing the second-factor verification step.

What is needed to start testing 2FA bypass against a target web application?

Testing 2FA bypass requires valid username and password credentials for the target application, authorized testing permission, and the target URL to begin analyzing 2FA flows and verification endpoints.