authbypass-authentication-flaws

Identify and document authentication bypass vulnerabilities across login, password reset, MFA, and session flows.

1.6k|204|Updated Apr 7, 2026
One-click install
npx skills add https://github.com/yaklang/hack-skills --skill authbypass-authentication-flaws
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: authbypass-authentication-flaws
Source: https://github.com/yaklang/hack-skills/tree/main/skills/authbypass-authentication-flaws
Command: npx skills add https://github.com/yaklang/hack-skills --skill authbypass-authentication-flaws

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Authentication bypass testing plays a critical role in identifying weaknesses in login flows, password reset logic, account recovery, MFA implementations, token generation, and session management.

Core Features & Use Cases

  • Comprehensive testing of login bypass techniques (SQL injection login bypass examples, enumeration, and brute-force resistance).
  • Assessment of password reset and recovery flows for token predictability and token lifecycle issues.
  • Evaluation of MFA integration, session handling, and potential bypass paths across web and API interfaces.
  • Real-world applicability for security assessments, bug bounty programs, and compliance checks.

Quick Start

Initiate a targeted authentication assessment by outlining test scope, selecting representative login and reset scenarios, and executing checks across login, password reset, MFA, and session flows.

Frequently Asked Questions about authbypass-authentication-flaws

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

FAQPage Schema
How do I test for authentication bypass vulnerabilities in web applications?

Test for authentication bypass vulnerabilities by executing structured checks across login, password reset, MFA, and session management flows. This identifies login bypass techniques, token predictability, and brute force weaknesses to document security flaws accurately.

What is an authentication bypass and how does session management affect it?

An authentication bypass allows unauthorized access by exploiting login, password reset, or MFA flaws. Session management impacts this through token predictability and lifecycle issues that permit attackers to bypass verification steps entirely.

How to test MFA and 2FA weaknesses in API interfaces?

Test MFA and 2FA weaknesses in API interfaces by evaluating MFA integration and session handling for potential bypass paths. This involves checking token generation predictability and verification enforcement across web and API layers.

Does this authentication testing approach work for cloud interfaces and APIs?

Yes, this authentication testing approach works for cloud interfaces and APIs. It applies to security assessments of web apps, APIs, and cloud interfaces, specifically targeting login bypass, token predictability, and session management flaws.

What are the best ways to check password reset token predictability?

Check password reset token predictability by assessing recovery flows for token lifecycle issues. This involves structured test plans that verify token generation randomness, expiration handling, and reset link reuse vulnerabilities.

What are the limitations when testing login bypass techniques?

Limitations when testing login bypass techniques include the strict requirement for safe handling of credentials and privacy considerations. Testing must be constrained to authorized security assessments and compliance checks to prevent unauthorized system access.