Web Security Basics (OWASP Top 10)
Web Security Basics (OWASP Top 10)
Overview
Security vulnerabilities are common and often easy to prevent with the right habits.
Frequent risks (simplified)
- Injection (SQL/NoSQL): use parameterized queries/ORMs
- XSS: escape output, avoid dangerouslySetInnerHTML
- Broken auth/session: secure cookies, short-lived tokens, MFA for admin
- CSRF: use SameSite cookies, CSRF tokens
- Sensitive data exposure: never commit secrets; use env vars and secret managers
Example
- Use prepared statements with placeholders instead of string concatenation
Checklist
- Use HTTPS everywhere
- Add content security policy (CSP) if possible
- Rotate secrets and limit privileges
Resources
- OWASP Top 10: owasp.org/www-project-top-ten
- Mozilla Observatory