web-app-logic

Installation
SKILL.md

Web Application Logic

Test for logic flaws and application-specific vulnerabilities that automated scanners miss.

Techniques

Type Key Vectors
Business Logic Workflow bypass, price manipulation, feature abuse
Race Conditions TOCTOU, limit bypass, double-spend, parallel requests
Access Control IDOR, horizontal/vertical privilege escalation, forced browsing
Cache Poisoning Unkeyed headers/parameters, fat GET, response splitting
Cache Deception Path confusion, static extension tricks, normalization
Info Disclosure Error messages, debug endpoints, source code, metadata

Workflow

  1. Map application workflows and business rules
  2. Identify state-dependent operations and trust boundaries
  3. Test logic assumptions with edge cases and race conditions
  4. Verify access control across user roles
  5. Document impact with PoC demonstrations

Reference

  • reference/business-logic*.md - Business logic testing techniques
  • reference/race-conditions*.md - Race condition exploitation
  • reference/access-control*.md - Access control bypass methods
  • reference/web-cache-poisoning*.md - Cache poisoning techniques
  • reference/web-cache-deception*.md - Cache deception attacks
  • reference/information-disclosure*.md - Information disclosure testing
Related skills
Installs
35
GitHub Stars
250
First Seen
Mar 21, 2026