Security isn't optional. Here are the vulnerabilities every web developer must understand and prevent.
HTTPS Everywhere
No exceptions. Even for 'just a blog.' Google penalizes HTTP sites. Let's Encrypt is free. There's zero excuse for not using HTTPS in 2026.
XSS (Cross-Site Scripting)
Never insert user input into HTML without escaping. Use template engines that auto-escape. Set Content-Security-Policy headers. Our code assistant can review code for XSS vulnerabilities.
CSRF (Cross-Site Request Forgery)
Always use anti-CSRF tokens on forms. Verify the Origin header. Use SameSite cookies.
Authentication
Hash passwords with bcrypt/argon2 (never MD5/SHA1). Use MFA. Set session timeouts. Never store passwords in plain text — not even in logs.