Comprehensive Business Logic Flaws Guide
🆕 Updated September 12, 2026 — added the Discuz! X5.0 chain: cross-context token reuse into a race condition into pre-auth RCE, and why a CAPTCHA in front of a race is a cost, not a boundary. Comprehensive Business Logic Flaws Guide A practitioner’s reference for business logic vulnerabilities — workflow bypass, race conditions, payment logic flaws, privilege escalation chains, and application context attacks. Includes 27 CVEs disclosed through 2026. 🆕 Newly Created: May 2, 2026 - Complete new guide built from 339 automated insights covering workflow bypass, race conditions, payment logic, and attack chains with 27 critical CVEs from comprehensive security research analysis. ...