• NEVER commit .env.local or any .env files to version control
• Use strong, randomly generated secrets for production
• Rotate credentials regularly

• Store Firebase private keys securely (use environment variables or secret management)
• Implement proper Firestore security rules
• Enable Firebase App Check for production

• Use strong NEXTAUTH_SECRET (generate with: openssl rand -base64 32)
• Implement proper session management
• Add rate limiting to authentication endpoints

1. Remove sensitive data from version control:

   git rm --cached .env.local
   echo ".env.local" >> .gitignore
   git add .gitignore
   git commit -m "Remove sensitive environment file"

2. Generate new credentials:

   • New Firebase project with fresh keys
   • New Google OAuth credentials
   • New NEXTAUTH_SECRET
   • New SMTP credentials

3. Update production environment:

   • Use proper secret management (Vercel secrets, AWS Secrets Manager, etc.)
   • Enable proper logging and monitoring
   • Implement rate limiting

• Always validate input data
• Implement proper error handling
• Use rate limiting middleware
• Log security events

• Implement proper Firestore security rules
• Use transactions for critical operations
• Validate data before storing
• Implement audit logging

• Sanitize user inputs
• Implement proper CSRF protection
• Use HTTPS in production
• Implement Content Security Policy (CSP)

• Remove .env.local from version control
• Generate new production secrets
• Implement Firestore security rules
• Add rate limiting to API routes
• Enable Firebase App Check
• Implement proper logging
• Add input validation to all forms
• Set up monitoring and alerts
• Implement proper error handling
• Add CSRF protection
• Configure CSP headers
• Enable HTTPS in production

1. Review dependencies for vulnerabilities
2. Check for exposed secrets in code
3. Audit user permissions and roles
4. Review API endpoint security
5. Test authentication flows
6. Validate input sanitization
7. Check for SQL injection vulnerabilities
8. Review error handling and logging

If you discover a security vulnerability:

1. Do not commit the fix to public repositories
2. Document the issue privately
3. Fix the vulnerability
4. Test the fix thoroughly
5. Deploy the fix
6. Monitor for any exploitation attempts