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name: security-checklist description: Security audit checklist covering OWASP Top 10, authentication, and secure coding practices.

Security Checklist

Quick reference checklist for security audits.

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1. OWASP Top 10 (2021+)

A01: Broken Access Control

• Authorization on all protected routes
• Deny by default
• Rate limiting implemented
• CORS properly configured

A02: Cryptographic Failures

• Passwords hashed (bcrypt/argon2, cost 12+)
• Sensitive data encrypted at rest
• TLS 1.2+ for all connections
• No secrets in code/logs

A03: Injection

• Parameterized queries
• Input validation on all user data
• Output encoding for XSS
• No eval() or dynamic code execution

A04: Insecure Design

• Threat modeling done
• Security requirements defined
• Business logic validated

A05: Security Misconfiguration

• Unnecessary features disabled
• Error messages sanitized
• Security headers configured
• Default credentials changed

A06: Vulnerable Components

• Dependencies up to date
• No known vulnerabilities
• Unused dependencies removed

A07: Authentication Failures

• MFA available
• Session invalidation on logout
• Session timeout implemented
• Brute force protection

A08: Integrity Failures

• Dependency integrity verified
• CI/CD pipeline secured
• Update mechanism secured

A09: Logging Failures

• Security events logged
• Logs protected
• No sensitive data in logs
• Alerting configured

A10: SSRF

• URL validation implemented
• Allow-list for external calls
• Network segmentation

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2. Authentication Checklist

• Strong password policy
• Account lockout
• Secure password reset
• Session management
• Token expiration
• Logout invalidation

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3. API Security Checklist

• Authentication required
• Authorization per endpoint
• Input validation
• Rate limiting
• Output sanitization
• Error handling

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4. Data Protection Checklist

• Encryption at rest
• Encryption in transit
• Key management
• Data minimization
• Secure deletion

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5. Security Headers

Header	Purpose
Content-Security-Policy	XSS prevention
X-Content-Type-Options	MIME sniffing
X-Frame-Options	Clickjacking
Strict-Transport-Security	Force HTTPS
Referrer-Policy	Referrer control

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6. Audit Commands Reference

Check	What to Look For
Secrets in code	password, api_key, secret
Dangerous patterns	eval, innerHTML, SQL concat
Dependency issues	npm audit, snyk

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Remember: Checklists catch obvious issues. Deep testing requires methodology.