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Security · Testing / AGENT SKILL

business-logic-vuln

yaklang/hack-skills
3.2K installs 2.3K GitHub stars
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Routes security testing for workflow abuse, race conditions, pricing flaws, and state attacks.
Entry P1 category router for business logic testing. Use when workflow abuse, race conditions, pricing flaws, or multi-step state attacks matter more than parser-level input injection.

BEFORE YOU INSTALL

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SECURITY REVIEW

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The full skill.

Original instructions from the publisher’s SKILL.md

# Business Logic Router

This is the routing entry point for business-logic and state-machine issues.

## When to Use

- The target involves coupons, inventory, payment, approvals, quotas, invites, trials, or state transitions
- The issue is not parser-level; it is about when checks happen and which business conditions are checked
- You suspect race conditions, workflow bypass, price tampering, negative values, stacked discounts, or multi-step flaws

## Skill Map

- [Business Logic Vulnerabilities](../business-logic-vulnerabilities/SKILL.md)

## Recommended Flow

1. First map key business states and one-time actions
2. Then check for check-then-act windows, sequence dependencies, or missing cross-step authorization
3. If the chain depends on APIs, uploads, or object permissions, return to the corresponding router skill to complete the path

## Related Categories

- [api-sec](../api-sec/SKILL.md)
- [auth-sec](../auth-sec/SKILL.md)
- [file-access-vuln](../file-access-vuln/SKILL.md)