You built your app with an AI coding tool — Cursor, Bolt, Replit, Lovable, or v0. It works. Users are signing up. Now a question is nagging at you: is it secure? The answer, statistically, is: probably not entirely. But here's the good news — scanning it for vulnerabilities has never been easier or cheaper.
This guide walks through exactly what to scan for, how to run a vulnerability scan on a vibe-coded app, and what to do with the results. No security background required.
Why Vibe-Coded Apps Are Especially Vulnerable
Vibe coding is fast — that's the whole point. But AI coding assistants optimize for functional code that satisfies the prompt. They don't model threats. A developer who prompts 'build me a REST API for user orders' gets working code that fetches and updates orders. What they rarely get are authorization checks verifying the order actually belongs to the user making the request.
After scanning thousands of vibe-coded applications, we consistently find the same vulnerability patterns: IDOR (insecure direct object reference), missing rate limiting on authentication endpoints, SQL injection in dynamic query parameters, and sensitive data over-exposure in API responses. These aren't edge cases — they're the default output of current AI coding tools.
By the numbers
In our analysis of vibe-coded apps, over 85% had at least one exploitable IDOR vulnerability. Over 60% had critical authentication flaws. Zero had complete OWASP Top 10 coverage out of the box.
The 7 Things Every Vibe App Vulnerability Scan Must Check
1. Insecure Direct Object Reference (IDOR)
IDOR is the most common critical vulnerability in vibe-coded apps. The test: create two user accounts, create a resource with account A (like an invoice, message, or profile), then try to access or modify that resource while logged in as account B by using the same resource ID. If it works, you have IDOR.
2. Broken Access Control
Beyond IDOR, check whether non-admin users can access admin routes. Navigate to /admin, /api/admin, or similar paths while logged in as a regular user. Try calling admin API endpoints with a regular user's JWT. AI-generated admin protection often checks authentication (are you logged in?) without checking authorization (are you an admin?).
3. Authentication Rate Limiting
Make 50 rapid login attempts with wrong credentials. Count the responses. If all 50 return within a few seconds and none trigger rate limiting or CAPTCHA, your login endpoint is vulnerable to credential stuffing attacks using leaked password databases.
4. SQL and NoSQL Injection
Test search fields, filter parameters, and sort parameters by appending ' OR 1=1 -- or a single quote. AI-generated code that builds dynamic SQL for features like "sort by column" is especially prone to injection. Even ORM-based code can be vulnerable when raw query escape hatches are used.
5. Sensitive Data Exposure
Inspect every API response. Do they return more fields than the frontend uses? Check for password_hash, is_admin, internal_id, or stripe_customer_id fields in user-facing responses. AI-generated APIs often return full database rows rather than selecting only the required fields.
6. Missing Security Headers
Check your HTTP response headers for Content-Security-Policy, X-Frame-Options, X-Content-Type-Options, and HSTS. AI-generated Next.js apps rarely configure next.config.ts security headers. Missing CSP opens you to XSS; missing X-Frame-Options exposes you to clickjacking.
7. CORS Misconfiguration
Check your CORS policy. A wildcard origin policy (Access-Control-Allow-Origin: *) combined with credentials means any site can make authenticated requests to your API. AI-generated CORS configurations frequently use wildcards to avoid development friction.
How to Run a Vulnerability Scan on Your Vibe App
Option 1: Manual Testing
Open your browser dev tools or Postman. Create two test user accounts. For every API endpoint, swap in the other user's resource IDs and see what happens. This is thorough but slow, and it requires knowing what to look for.
Option 2: Automated Vulnerability Scanner
Tools like OWASP ZAP can do basic web application scanning — detecting missing headers, obvious injection points, and known patterns. However, ZAP won't find IDOR or authorization flaws because it doesn't test cross-user access. It's a starting point, not a complete solution.
Option 3: AI-Powered Penetration Testing
Purpose-built tools for vibe-coded apps use AI agents that actually attempt to exploit your application. They authenticate as multiple users, attempt to access cross-user resources, chain low-severity findings into critical exploits, and confirm vulnerabilities by demonstrating successful exploitation. Pentrust is built specifically for this — it runs a full scan in under 30 minutes and provides copy-paste fixes for every confirmed finding.
What to Do With Your Scan Results
Prioritize ruthlessly. Fix critical vulnerabilities (IDOR, auth bypass, injection) before anything else — these create legal liability and can lead to data breaches. High-severity issues (sensitive data exposure, CORS misconfig) come next. Medium and low severity issues can be scheduled into your normal development sprint.
After applying fixes, re-run the scan to verify each issue is resolved. Security is an ongoing practice, not a one-time event. Scan again whenever you add new features, especially ones that involve user data or authentication.
Ready to check your app?
Find your vulnerabilities before attackers do.
Pentrust runs AI agents that chain real exploits against your vibe-coded application and provides copy-paste fixes for every finding. Full pentest in under 30 minutes.
Run a free pentest