Fix Logic Flow Bypass in Masonite
Logic Flow Bypass in Masonite occurs when an application's business logic can be subverted by manipulating the request sequence or parameter state. In Masonite's MVC architecture, this often happens when developers assume a specific execution order without enforcing server-side state verification, allowing attackers to skip critical steps like payment or authorization checks.
The Vulnerable Pattern
from masonite.controllers import Controller from masonite.views import View from masonite.request import Request
class CheckoutController(Controller): def success(self, request: Request, view: View): # VULNERABILITY: Logic assumes the user reached this via a successful payment. # An attacker can browse directly to /checkout/success?order_id=123 order_id = request.input(‘order_id’) return view.render(‘receipt’, {‘order_id’: order_id})
The Secure Implementation
The vulnerability stems from trusting the client's request path rather than enforcing a server-side state machine. In the vulnerable snippet, any user can trigger the 'success' logic by simply hitting the route. The secure implementation uses Masonite's Session provider to verify that a 'payment_confirmed' flag exists for that specific order, which should only be set by the internal payment processing logic. For high-security flows, always validate the state against the database and use signed session cookies to prevent tampering.
from masonite.controllers import Controller
from masonite.views import View
from masonite.request import Request
from masonite.sessions import Session
class CheckoutController(Controller):
def success(self, request: Request, view: View, session: Session):
order_id = request.input(‘order_id’)
# SECURE: Verify a server-side session flag set during the payment callback
if not session.get(f'payment_confirmed_{order_id}'):
return request.redirect('/checkout/payment')
# Optional: Clear state after consumption
session.delete(f'payment_confirmed_{order_id}')
return view.render('receipt', {'order_id': order_id})</code></pre>
Your Masonite API
might be exposed to Logic Flow Bypass
74% of Masonite apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.
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