Web Security for Builders
Security is not a feature you add at the end — it is the set of decisions you make while building. This course covers the attacks that actually affect web applications in production: SQL injection, XSS, broken authentication, insecure direct object references, and more. You will understand how each attack works, why it works, and exactly what code patterns prevent it. Written for builders, not security specialists.
What you'll learn
Course outline
Free — no account needed
Why Builders Need to Care About Security
The attacks that hit real products — and why "I'm too small to be targeted" is wrong
The OWASP Top 10 — The Vulnerabilities That Win
A guided tour of the 10 most exploited web application security risks
SQL Injection — How It Works and How to Stop It
The oldest web vulnerability is still the most exploited — here is why and what prevents it
Full course — $59 one-time
Cross-Site Scripting (XSS) — Input Validation and Output Encoding
How attackers inject JavaScript into your pages — and the output encoding that stops it
Authentication Vulnerabilities
Brute force, credential stuffing, weak session tokens — and the patterns that prevent them
CSRF and API Security
Cross-Site Request Forgery, CORS misconfigurations, and securing your API endpoints
Secrets Management — Environment Variables Done Right
API keys, database credentials, and JWT secrets — the patterns that keep them out of your code
Security Checklist Before Launch
The 20 checks that cover 90% of common vulnerabilities before your first real user
Get the full course
8 lessons — from the attacker's mindset to the pre-launch security checklist.