race-condition

Name: race-condition
Availability: InStock
Author: din4e

Identify and exploit race-condition vulnerabilities in web applications.

2|Updated Apr 21, 2026

Search Tags:#concurrency #web-security #multithreading #timing-attack #race-condition #toctou #burp-intruder

Ready to run

npx skills add https://github.com/din4e/Skills4RedTeam --skill race-condition-din4e

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: race-condition
Source: https://github.com/din4e/Skills4RedTeam/tree/main/skills/offensive-race-condition
Command: npx skills add https://github.com/din4e/Skills4RedTeam --skill race-condition-din4e

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Race condition vulnerabilities (TOCTOU) in web applications cause state inconsistencies, unauthorized access, and potential financial or data integrity losses when multiple concurrent requests interact with shared resources.

Core Features & Use Cases

TOCTOU timing window identification and reproducible exploitation guidance for multi-step transactions
Parallel request techniques using Burp Suite Turbo Intruder and custom scripts to reveal race conditions
Coverage of rate-limiter bypass, token reuse, and concurrent operation scenarios across REST, WebSocket, and serverless architectures

Quick Start

Run a controlled set of parallel requests against a critical endpoint to observe race-condition manifestations and document any state inconsistencies.

Frequently Asked Questions about race-condition

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

FAQPage Schema

How do I detect and exploit web race conditions in multi-step transactions?▼

To detect and exploit web race conditions in multi-step transactions, you need to send controlled concurrent requests to critical endpoints. This reveals TOCTOU timing windows and state inconsistencies by observing how parallel operations interact with shared application resources.

How does a TOCTOU timing attack work against REST APIs and serverless platforms?▼

A TOCTOU timing attack works by executing parallel requests during the vulnerability window between checking a condition and using the result. It targets state inconsistencies across REST APIs, WebSocket connections, and serverless platforms to trigger unauthorized concurrent operations.

Can I use Burp Suite Turbo Intruder for parallel request race condition testing?▼

Yes, you can use Burp Suite Turbo Intruder for race condition testing by running parallel-request scripts against critical endpoints. This approach effectively identifies timing windows, rate-limiter bypass scenarios, and token reuse vulnerabilities across targeted web applications.

What is the best way to bypass rate limits using concurrent requests?▼

The best way to bypass rate limits using concurrent requests is to exploit race conditions by firing simultaneous parallel requests. This technique overwhelms the server's state validation logic before it can properly synchronize shared resource counters or enforce transaction limits.

Does race condition testing work for MFA bypass and token reuse scenarios?▼

Race condition testing works effectively for MFA bypass and token reuse scenarios by submitting concurrent operations that exploit timing windows. Sending simultaneous requests allows multiple transactions to validate against the same initial state before any single operation locks or updates it.

Why do concurrent requests cause state inconsistencies in web applications?▼

Concurrent requests cause state inconsistencies in web applications when multiple parallel operations interact with shared resources without proper locking mechanisms. This TOCTOU vulnerability allows simultaneous transactions to read and modify identical application states, bypassing intended validation controls.