Penetration Testing
: A security assessment methodology where authorized security professionals simulate real-world attacks against an application, network, or system to identify exploitable vulnerabilities. Unlike automated scanning, penetration testing involves manual testing, creative attack chaining, and business logic analysis to find issues that automated tools miss.
Why It Matters for AI-Coded Apps
Automated scanners (SAST, DAST) catch common vulnerability patterns but miss business logic flaws, complex attack chains, and context-specific issues. For vibe-coded apps heading to production, a penetration test validates that the AI-generated code actually withstands real attack techniques, not just known patterns.
Real-World Example
A pentest of a vibe-coded SaaS finds: the password reset flow allows account takeover by manipulating the email parameter, the subscription endpoint allows negative quantities (free credits), admin API endpoints are accessible without authentication, and combining IDOR with mass assignment enables full privilege escalation to admin.
How to Detect and Prevent It
Schedule penetration tests before major launches, after significant changes, and annually at minimum. Use qualified pentesters (OSCP, CREST certified). Define scope clearly (which endpoints, environments, and attack types). Fix critical and high findings before deploying to production. Retest after fixes to verify remediation.
Frequently Asked Questions
How much does a penetration test cost?
For a typical web application: $5,000-$25,000 depending on scope, complexity, and tester experience. Bug bounty programs offer an alternative with pay-per-finding pricing. Some free options exist: OWASP ZAP automated scanning, self-testing with Burp Suite Community Edition, and peer code review.
How often should I pentest my vibe-coded app?
At minimum: before initial launch, after adding authentication or payment features, and annually. For apps handling sensitive data or payments, quarterly testing is recommended. Continuous automated testing (DAST in CI/CD) supplements periodic manual pentests.
What is the difference between a pentest and a vulnerability scan?
A vulnerability scan is automated and identifies known vulnerability patterns. A penetration test is manual, involving creative exploitation, attack chaining, and business logic testing. Scans find low-hanging fruit; pentests find real-world exploitable vulnerabilities. Use scans continuously and pentests periodically.
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