PAY-004high SeverityPayment Processing & Webhook Integrity
invoice.payment_failed Handled to Notify User & Restrict Features
AI templates assume all recurring payments succeed, ignoring declined cards and expired payment methods.
1-Click Fix Prompt for Cursor & Claude Code
Review my codebase for "invoice.payment_failed Handled to Notify User & Restrict Features" (PAY-004). Issue: AI templates assume all recurring payments succeed, ignoring declined cards and expired payment methods. Remediation required: Mark subscription status as past_due on invoice.payment_failed and prompt user to update billing details. Please: 1. Locate any occurrences of this issue across my repository. 2. Refactor the code to follow production standards without breaking existing functionality. 3. Provide a clear command or step to test and verify the fix.
Why AI Assistants Write This Bug
AI templates assume all recurring payments succeed, ignoring declined cards and expired payment methods.
AI code generation prioritizes immediate syntax execution over production edge cases. When an assistant hits an undefined variable or strict type error, it frequently takes the path of least resistance rather than implementing standard pre-launch security patterns.
Code Comparison
Common AI Code PatternVulnerable
// Vulnerable AI-generated pattern for: invoice.payment_failed Handled to Notify User & Restrict Features
// Flawed Stripe webhook handler
export async function POST(req: Request) {
const body = await req.json(); // BUG: Fails signature verification!
const signature = req.headers.get("stripe-signature");
// Unhandled events drop silently
return Response.json({ received: true });
}Launch-Ready Fix
// Production-ready fix for: invoice.payment_failed Handled to Notify User & Restrict Features
// Fixed Stripe webhook with raw text buffer
export async function POST(req: Request) {
const body = await req.text(); // Raw text preserves HMAC signature
const signature = req.headers.get("stripe-signature");
const event = stripe.webhooks.constructEvent(body, signature!, process.env.STRIPE_WEBHOOK_SECRET!);
// Acknowledge receipt with 200
return Response.json({ received: true }, { status: 200 });
}Remediation & Verification Checklist
Remediation: Mark subscription status as past_due on invoice.payment_failed and prompt user to update billing details.
- Search your codebase for pattern matching "invoice.payment_failed Handled to Notify User & Restrict Features".
- Apply the recommended remediation: Mark subscription status as past_due on invoice.payment_failed and prompt user to update billing details.
- Run local build and test commands to ensure no regressions.
- Verify in your browser or with curl that the issue is resolved.
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