AI App Security
Built Your App with AI?
It Probably Has Vulnerabilities.
AI coding tools like Cursor, Lovable, Bolt, and v0 are great at building features fast. They're not great at making them secure. Nullscan finds the vulnerabilities AI left behind.
Why AI-Generated Code Is Vulnerable
AI coding assistants optimize for one thing: making your feature work. Security is an afterthought — if it's a thought at all. Here's what that looks like in practice.
No Input Validation
criticalAI-generated API routes often accept user input directly without sanitization. This opens the door to SQL injection, XSS, and other injection attacks.
Weak Authentication
highDefault auth configurations, missing rate limiting on login endpoints, and predictable session handling are common in AI-built apps.
Missing Security Headers
mediumAI tools rarely add CSP, HSTS, X-Frame-Options, or other headers that protect against common web attacks.
Exposed Endpoints
highAdmin routes, debug endpoints, and internal APIs that should be restricted often end up publicly accessible.
No Rate Limiting
mediumPassword reset, login, and API endpoints without rate limiting are trivial to brute force.
Insecure Defaults
highAI uses default configurations that work for development but are insecure in production — verbose error messages, CORS wildcards, debug modes left on.
This Applies to All AI Coding Tools
Regardless of which AI tool you used to build your app, the security gaps are similar. Nullscan works with all of them.
How Nullscan Finds What AI Missed
Nullscan doesn't just check headers or run a list of known exploits. It deploys AI agents that think like real attackers — probing your app for weaknesses the same way a human pentester would.
Real Penetration Testing
AI agents actively probe your endpoints, attempt injection attacks, try to bypass authentication, and test access controls. This is not a static analysis tool.
Covers the OWASP Top 10
SQL injection, XSS, broken access control, SSRF, path traversal, security misconfigurations — every critical vulnerability category is tested.
Results You Can Act On
Every finding includes the affected endpoint, severity level, and impact assessment. Paid reports include step-by-step reproduction and fix guidance you can hand directly to your AI tool to fix.
No Setup Required
Nullscan scans your live app externally. No code access, no agents to install, no CI/CD integration needed. Paste your URL and go.
Scan Your AI-Built App Now
Find out what your AI coding tool missed. Free scan, no signup.
Frequently Asked Questions
Are AI-built apps less secure than manually coded apps?
AI coding tools prioritize functionality over security. They generate code that works, but often miss input validation, rate limiting, proper auth flows, and security headers. This makes AI-built apps more likely to have exploitable vulnerabilities than apps built by security-conscious developers.
Which AI coding tools produce vulnerable code?
This isn't specific to any one tool. Apps built with Cursor, Lovable, Bolt, v0, Replit, Windsurf, and other AI tools can all produce code with security gaps. The core issue is that AI optimizes for features, not security.
How do I secure my AI-built app?
Start by running an automated security scan to identify existing vulnerabilities. Fix the issues found, then run scans regularly as you add features. Each new feature your AI tool generates could introduce new vulnerabilities.
Can Nullscan scan apps built with any AI tool?
Yes. Nullscan is an external scanner that tests your live application regardless of how it was built. It works with apps built using any AI coding tool, framework, or language. All it needs is your app's URL.
I used AI to build my app but I'm not technical. Can I still use Nullscan?
Yes. The free scan gives you a clear report showing what's wrong and how severe it is. If you unlock the full report, you get fix guidance written in plain language that you can paste directly into your AI coding tool to fix the issues.