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.