Business Logic Abuse: The Attack You Can't Patch #businesslogic #apisecurity #cybersecurity

The attack that no patch can fix 🛑

Scenario:
"Give me one million pizzas"
API responds: "OK, one million pizzas at $0.01 each"
Attacker: "Thanks!"

What happened?
✅ API works exactly as designed
✅ Syntax is correct
✅ Protocol is followed
✅ WAF sees nothing wrong
❌ BUT the business logic intended: "Max 100 pizzas per order, at normal pricing"

This is Business Logic Abuse.
Business Logic Abuse means using an API exactly as it's built, but NOT how it's intended. You can patch any code vulnerability. But you can't patch a person who figured out your API lets them do something profitable.
This is why traditional vulnerability scanning fails. Traditional tools test protocols and syntax. They don't understand your business.

Real examples of Business Logic Abuse:
❌ Bypassing purchase limits
❌ Manipulating discounts
❌ Unauthorized refunds
❌ Moving money between accounts
❌ Mass registration for bonuses

How to defend:
✅ Test against business logic, not just syntax
✅ Use behavioral fuzzing
✅ Monitor for anomalies (patterns that deviate from normal)
Have you tested your API for business logic abuse? 👇
https://www.wallarm.com/resources/a-cisos-guide-to-api-security