Individual skill
hunt-business-logic
Hunting skill for business logic vulnerabilities. Built from 12 public bug bounty reports. Covers coupon-race-stacking (Instacart, Stripe, Reverb), negative-quantity-in-cart price tampering (Upserve, Eternal/Zomato), decimal/fraction price-field overflow (Shipt), client-side checkout amount trust on PayPal redirect (WordPress.org), price-per-unit mass-assignment (Krisp), and archived-price swap / cart-TOCTOU (Stripe). Use when hunting business logic — heavy emphasis on financial-impact-demonstrated cases.
skills/hunt-business-logic/SKILL.md
Source commit 961a0dd3d2d2f66a07a416ade3b1d4473b64802e
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- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Not checked yet
- Last checked
- Nov 4, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 1,008
- Repository last updated
- Nov 5, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai-agent Repository topic
- appsec Repository topic
- bug-bounty Repository topic
- cybersecurity Repository topic
- devsecops Repository topic
- exploit-validation Repository topic
- hermes-agent Repository topic
- infosec Repository topic
- llm-security Repository topic
- nuclei Repository topic
- finance Derived category
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## Crown Jewel Targets
Business logic vulnerabilities pay highest in platforms where financial transactions, identity verification, and access controls intersect with real-world consequences. The richest targets are:
- **E-commerce & payment platforms** (Valve/Steam, Shopify) — payment flow manipulation, free goods, price tampering
- **Marketplace & gig economy apps** (Airbnb, Uber) — identity/verification bypass enabling fraud or unsafe interactions
- **SaaS with tiered access** (Mozilla Monitor) — bypassing verification to unlock monitoring features without entitlement
- **High-traffic consumer apps** (Snapchat, Yelp) — rate-limit bypass enabling spam, enumeration, or abuse at scale
Asset types that pay: checkout flows, subscription endpoints, callback/verification systems, webhook handlers, employee/internal portals exposed to the internet, and any endpoint that trusts client-supplied data to make authorization decisions.
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## Attack Surface Signals