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Web Application Pen Testing — Finding Your Own Vulnerabilities

Testing your own apps for SQL injection, XSS, and CSRF with a defensive focus on authorized security testing

16 min readpen-testing, sql-injection, xss, csrf, owasp, web-security

Here's a truth that might be uncomfortable: the best time to find vulnerabilities in your application is before anyone else does. You don't need to be a professional pen tester to check your own code for the most common web vulnerabilities. You just need to know what to look for and how to test it.

This lesson is entirely about defensive security testing — testing your own applications, with your own authorization, to find and fix vulnerabilities before they become incidents. Every technique here should be applied to systems you own or have explicit written permission to test.

The OWASP Top 10 as Your Testing Checklist

The OWASP Top 10 is the industry-standard list of the most critical web application security risks. Think of it as the "greatest hits" of web vulnerabilities. If

This lesson is part of the Guild Member curriculum. Plans start at $29/mo.