Fix Logic Flow Bypass in Spiral
Logic flow bypass in Spiral occurs when developers rely on client-side sequencing or implicit route ordering rather than enforcing server-side state transitions. In high-performance PHP environments using RoadRunner, failing to validate the 'state' of a business process (like checkout or MFA) allows an attacker to jump directly to the final execution endpoint, skipping critical validation or payment steps.
The Vulnerable Pattern
public function finalizeOrder(Request $request): array { // VULNERABILITY: The controller assumes the user has completed the payment step // because they reached this 'finalize' endpoint. No server-side state check. $orderId = $request->getAttribute('order_id'); $order = $this->orders->findByPK($orderId);$this->shippingService->dispatch($order); return [ 'status' => 'success', 'message' => 'Order dispatched.' ];
}
The Secure Implementation
To prevent logic bypass, treat every request as potentially out-of-order. The secure implementation uses Cycle ORM to fetch the current record and validates its status against an expected state (OrderStatus::PAID). If the record is not in the correct state, the request is rejected. Always implement a server-side state machine or use session-backed tokens to verify that prerequisites for a specific route have been fulfilled, rather than trusting the UI flow.
public function finalizeOrder(Request $request): array { $orderId = $request->getAttribute('order_id'); $order = $this->orders->findByPK($orderId);// SECURE: Strict state machine validation // Verify the entity is in the specific 'PAID' state before allowing dispatch if (!$order || $order->status !== OrderStatus::PAID) { throw new ForbiddenException('Invalid flow sequence: Order must be paid before finalization.'); } $this->shippingService->dispatch($order); $order->status = OrderStatus::COMPLETED; $this->orm->save($order); return [ 'status' => 'success', 'message' => 'Order dispatched.' ];
}
Your Spiral API
might be exposed to Logic Flow Bypass
74% of Spiral apps fail this check. Hackers use automated scanners to find this specific flaw. Check your codebase before they do.
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