Your vibe-coded app shipped.
Is it secure?
You built it with Cursor, Bolt, Lovable, v0 or Replit Agent. Functionality: shipped. Security: probably broken. Resync finds the vulnerabilities AI coding tools consistently produce — by hand, by an OSCP-certified pentester, with a report you can read on the same day.
AI writes working code. Not secure code.
AI coding tools are trained on the entire internet's worth of public code — which, on average, is not security-hardened. They optimize for "what makes the user say yes" and "what looks like it works." Those are not security objectives.
Worse: when you describe a feature in natural language ("let users edit their profile"), the AI infers an implementation. It rarely infers the right authorization model, the right input validation, or the right secret-handling strategy — because you didn't say so explicitly.
The result is a predictable pattern. The same classes of vulnerability appear in almost every vibe-coded app Resync reviews. Below: the actual list.
AI coding tools are extraordinary. They compress months of work into days. The point isn't to stop using them — it's to recognize that shipped functionality ≠ shipped security, and to close the gap before someone else finds it.
The vibe-coded vulnerability pattern.
These are the issues found again and again in AI-generated apps. Most of them are logic flaws — invisible to automated scanners, but obvious to a human attacker probing endpoint by endpoint.
Missing authorization on endpoints
The AI generates a "/api/users/:id" endpoint. Authentication is required. Authorization — checking whether you're allowed to view that specific user — is forgotten. Any logged-in user can read everyone's data.
IDOR (Insecure Direct Object Reference)
Resources are exposed by sequential or guessable IDs. Change ?order=1042 to ?order=1041 and you see someone else's purchase. The classic vibe-coded breach.
Hardcoded secrets & exposed API keys
Stripe keys in client-side bundles. OpenAI tokens in .env.local files committed to git. Database URLs in client-rendered Next.js pages. Public Supabase service-role keys.
SQL/NoSQL injection & unsafe queries
Especially when the AI generates dynamic queries based on user input that wasn't supposed to reach the DB. Common in filter, sort, and search features.
Overly permissive CORS
Access-Control-Allow-Origin: * with credentials enabled. Lets any website read your authenticated user's data via the browser.
Exposed admin routes
Admin dashboards reachable at predictable URLs (/admin, /dashboard) protected only by client-side React route guards — easily bypassed by hitting the API directly.
Unsafe file uploads
Avatar uploads that accept any MIME type and execute server-side. Path traversal via filename. Direct uploads to public S3 buckets with read access for anyone.
Prompt injection & AI-feature abuse
If your app calls an LLM with user input, that's an attack surface. Users can hijack the system prompt, extract data from your context, or call tools you didn't intend to expose.
Business logic & payment flaws
Race conditions in checkout. Price set client-side and trusted by server. Discount codes reusable in parallel. Inventory going negative. Subscriptions cancellable without ownership check.
Database row-level security gaps
Especially in Supabase/Firebase apps: tables created without RLS policies, or with policies that look correct but allow cross-tenant reads via clever filter chains.
SAST tools don't speak vibe-coded.
The standard advice is "run Snyk / Semgrep / Dependabot." Useful — for known CVE patterns and library vulnerabilities. But the vibe-coded vulnerability pattern is almost entirely about logic, authorization, and architecture. Those are:
- Not pattern-matchable — they depend on the data model and intended access rules
- Not in any signature database — they're business logic, not library bugs
- Specific to your app — a scanner doesn't know who should see what
- Often spread across multiple files — an attacker chains three small flaws into one breach
The only way to find them is for a human to think like an attacker while exercising your actual application. That's what Resync does.
What you get.
Fixed price · 1-week turnaround
Manual penetration test specifically tailored to AI-generated apps. Pricing depends on scope (number of features, integrations, AI surface area) — quote within one business day after intake.
The Vibe Coding Security Checklist.
Before you ship — or before you book an audit — run through this. If you can confidently check every box, you've already eliminated the top 80% of vibe-coded vulnerability patterns.
Self-audit checklist (top 12)
Tick boxes are for browser-side use only — nothing is sent anywhere. Use it as a pre-launch gate.
Common questions from founders.
I have ~3 paying users. Is it too early for an audit?
We use Supabase / Firebase. Doesn't that handle security?
Can we just run a vulnerability scanner instead?
What does an audit cost?
Do you sign NDAs and work via Slack?
We're based outside the Netherlands. Does that matter?
Ship fast. Stay secure.
One short intake call. Fixed price quote within one business day. Audit completed in a week. Report you can act on the same day.
Book intake call → Back to home