business-logic-review

name	business-logic-review
description	Review an authorized application for business-logic vulnerabilities, workflow abuse, approval bypasses, replay conditions, quota circumvention, plan enforcement bugs, and state-transition errors. Use for billing, invites, approvals, refunds, admin actions, and multi-step workflows.

Business Logic Review

Focus

• state machine gaps
• approval or refund bypasses
• replay and duplicate processing
• quota and entitlement circumvention
• race conditions around credits, inventory, or invitations
• UI-only controls missing server-side enforcement

Method

1. Identify the invariant the product is trying to preserve.
2. Trace where the invariant is enforced.
3. Look for alternate paths, retries, replays, and admin shortcuts.
4. Confirm whether enforcement survives background jobs and webhooks.