authentication-failures

Identify and remediate authentication failures in login flows, session management, and token handling.

20|Updated Feb 27, 2026
One-click install
npx skills add https://github.com/thejefflarson/soundcheck --skill authentication-failures-thejefflarson
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: authentication-failures
Source: https://github.com/thejefflarson/soundcheck/tree/main/.claude/skills/authentication-failures
Command: npx skills add https://github.com/thejefflarson/soundcheck --skill authentication-failures-thejefflarson

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Protects identity and session integrity by guiding secure authentication patterns in code, preventing weak password storage, improper JWT handling, and insecure session management.

Core Features & Use Cases

  • Guidance for secure authentication flows, session handling, and token management.
  • Real-world patterns and fixes for common vulnerabilities such as insecure password storage, weak JWT verification, and session persistence after logout.
  • Use Case: A backend service implementing login, remember-me, and API key management while meeting security standards.

Quick Start

Configure your project to apply secure authentication checks and immediately scan for common flaws in login flows and session handling.

Frequently Asked Questions about authentication-failures

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

FAQPage Schema
How do I fix insecure password storage and weak JWT verification in my login flows?

To fix insecure password storage and weak JWT verification, implement secure password hashing, enforce strong JWT signature validation, and apply constant-time comparisons to prevent timing attacks during authentication.

Why does my user session stay active after logout and how do I prevent session hijacking?

Sessions stay active after logout when server-side invalidation is missing. Prevent session hijacking by enforcing immediate session invalidation on logout and securing session management tokens across web applications and APIs.

What is the best way to prevent credential stuffing in web applications and APIs?

The best way to prevent credential stuffing is to review authentication patterns for strong token handling, secure session management, and robust login flow protections to safeguard identity and session integrity.

How do I scan code for authentication failures during a security review?

Scan code for authentication failures by configuring a project to apply secure authentication checks, automatically identifying common flaws in login flows, API key management, and token handling during development.

Does this approach work for backend services implementing remember-me and API key management?

Yes, this approach works for backend services by providing guidance for secure authentication flows, remember-me features, and API key management to meet security standards and prevent impersonation attempts.