Cursor accelerates coding but doesn't audit the code it generates. Here are the production gaps that appear most often in Cursor-built apps.
Default stack: varies · varies
The part that breaks first
Cursor writes confident, plausible code — including a Stripe webhook that parses the body but never verifies the signature. It looks done. It passes your manual test. And it lets anyone on the internet POST a fake 'payment succeeded' event straight into your database.
And then this becomes your life
So now you read every diff twice. You don't trust the auth middleware until you've clicked every route yourself. You keep a mental list of 'things the AI probably got subtly wrong' — and that list is the real product you're maintaining.
Cursor made you feel like a 10x developer. Then the app went live and you became a full-time code reviewer for an author who never sleeps, never explains itself, and confidently ships race conditions you only find when two users hit the same row.
The good news: every one of these is findable, and most are fixable fast. Here's exactly what tends to be wrong in Cursor apps.
These aren't hypothetical — they show up in the free audits. See the full production-readiness guide →
Cursor frequently generates Stripe webhook handlers that parse the body but skip `stripe.webhooks.constructEvent`. Without signature verification, anyone can POST fake payment events.
LLM-generated async code often has subtle race conditions — two requests updating the same row simultaneously without transactions or optimistic locking.
Cursor may protect some routes with auth middleware and miss others. A single unprotected route exposing user data is a breach regardless of how many protected ones exist.
Network retries on Stripe calls without idempotency keys can double-charge users. Cursor-generated payment code rarely includes idempotency key handling.
Check these before you share the URL publicly.
Stripe webhook uses stripe.webhooks.constructEvent with the webhook secretcritical
All API routes that return user data have auth checkscritical
Concurrent write paths use transactions or idempotencycritical
Stripe API calls include idempotency keyscritical
Error responses don't leak stack traces or internal paths
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