# Testing For Business Logic Vulnerabilities

> Use when identifying flaws in application business logic that allow price manipulation, workflow bypass, and privilege escalation beyond what technical vulnerability scanners can detect. Use when working with testing for business logic vulnerabilities.

- Skill: `oyi77/testing-for-business-logic-vulnerabilities` (Agent Skill)
- Install (CLI): `npx skillmds add oyi77/testing-for-business-logic-vulnerabilities`
- Raw SKILL.md: https://api.skillmd.com/api/skills/oyi77/testing-for-business-logic-vulnerabilities/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Productivity
- License: Apache-2.0
- Author: oyi77 (https://skillmd.com/u/oyi77)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/oyi77/testing-for-business-logic-vulnerabilities

---


# Testing For Business Logic Vulnerabilities

## Overview

Cybersecurity skill for testing for business logic vulnerabilities. Follows industry best practices and security standards.

## When to Use
**Trigger phrases:**
- "testing for business logic vulnerabilities"
- "Identifying flaws in application business logic that allow price manipulation, w"


- During authorized penetration tests when automated scanners have found few technical vulnerabilities
- When assessing e-commerce platforms for pricing, cart, and payment flow manipulations
- For testing multi-step workflows (registration, checkout, approval processes) for bypass opportunities
- When evaluating rate-limited features like vouchers, coupons, referrals, and rewards systems
- During security assessments of financial applications, voting systems, or any application with critical business rules


## When NOT to Use

- When you lack proper authorization for testing
- For production systems without change management
- When the task requires legal or compliance expertise beyond technical scope


## Prerequisites

- **Authorization**: Written penetration testing agreement covering business logic testing
- **Burp Suite Professional**: For intercepting and modifying multi-step request flows
- **Application understanding**: Thorough knowledge of the application's intended business workflows
- **Multiple test accounts**: Accounts at different privilege levels and states
- **Browser DevTools**: For examining client-side validation logic
- **Documentation**: Business requirements or user stories describing expected behavior

## Workflow

```python
# Example: IOC detection
import re

IOC_PATTERNS = {
    "ip": r"\b(?:\d{1,3}\.){3}\d{1,3}\b",
    "domain": r"\b[a-z0-9-]+\.[a-z]{2,}\b",
    "hash_md5": r"\b[a-f0-9]{32}\b",
    "hash_sha256": r"\b[a-f0-9]{64}\b",
}

def extract_iocs(text: str) -> dict:
    return {k: re.findall(v, text) for k, v in IOC_PATTERNS.items()}
```

1. **Reconnaissance** — Gather information about the target related to . Identify attack surface.
2. **Vulnerability Identification** — Enumerate potential  weaknesses using automated and manual techniques.
3. **Exploit Development/Selection** — Use business logic vulnerabilities to identify and test  vulnerabilities.
4. **Execution** — Execute the  test in a controlled manner with proper authorization.
5. **Post-Exploitation** — Document the impact and extent of successful exploitation.
6. **Reporting** — Write detailed findings with reproduction steps, impact assessment, and remediation guidance.

## Tools

- **business logic vulnerabilities** — Primary tool for this skill
- **Vulnerability Scanner** — Automated weakness identification
- **Exploitation Framework** — Controlled exploitation testing
- **Reporting Tool** — Findings documentation and tracking


## Process

1. **Reconnaissance** — Gather target information, identify attack surface, enumerate services
1. **Analysis/Exploitation** — Execute the technique, analyze results, document findings
1. **Reporting** — Document IOCs, write findings, provide remediation recommendations

## Verification

- [ ] All  procedures executed completely and documented
- [ ] Findings validated against multiple data sources
- [ ] False positives identified and filtered
- [ ] Results documented with evidence and timestamps
- [ ] Recommendations provided with risk-based prioritization

## Anti-Rationalization Table

| Rationalization | Reality |
|---|---|
| "We are too small to be targeted" | Automated attacks target everyone. Size does not matter. |
| "Security slows us down" | A breach slows you down 100x more. Build security in from the start. |
| "We will fix it after launch" | Vulnerabilities in production are exploited within hours. Fix before deploy. |