• Issue: Django SECRET_KEY and database credentials were hardcoded in settings.py
• Fix: Moved all sensitive data to environment variables
• Files Modified:
  • Backend/backend/settings.py
  • Backend/env.example
  • FL Model/flask/app.py

• Issue: CORS_ALLOW_ALL_ORIGINS = True allowed any domain to make requests
• Fix: Made CORS configurable via environment variables with secure defaults

• Issue: DEBUG = True in production settings
• Fix: Made debug mode configurable via environment variables

# Django Settings
DJANGO_SECRET_KEY=your-secure-secret-key
DEBUG=False
ALLOWED_HOSTS=your-domain.com,www.your-domain.com

# Database Settings
DB_NAME=DiseasePrediction
DB_USER=postgres
DB_PASSWORD=your-secure-password
DB_HOST=localhost
DB_PORT=5432

# CORS Settings
CORS_ALLOW_ALL_ORIGINS=False
CORS_ALLOWED_ORIGINS=http://localhost:3000,https://your-domain.com

# Email Settings
EMAIL_USER=your-email@gmail.com
EMAIL_PASS=your-app-password

# API Keys
GEMINI_API_KEY=your-gemini-api-key

# Flask App (FL Model)
FLASK_DEBUG=False

• ✅ Never commit .env files to version control
• ✅ Use strong, unique passwords for each environment
• ✅ Rotate secrets regularly

• ✅ Use strong database passwords
• ✅ Limit database user permissions
• ✅ Enable SSL connections in production
• ✅ Regular database backups

• ✅ Only allow necessary origins
• ✅ Use HTTPS in production
• ✅ Avoid CORS_ALLOW_ALL_ORIGINS=True in production

• ✅ Set DEBUG=False in production
• ✅ Configure ALLOWED_HOSTS properly
• ✅ Use HTTPS and secure cookies
• ✅ Enable CSRF protection

• ✅ Use JWT tokens with appropriate expiration
• ✅ Implement rate limiting
• ✅ Validate all input data
• ✅ Use HTTPS for all API calls

Before deploying to production:

• Generate new Django SECRET_KEY
• Set DEBUG=False
• Configure ALLOWED_HOSTS
• Set secure database credentials
• Configure CORS properly
• Enable HTTPS
• Set up proper logging
• Configure backup strategy
• Set up monitoring and alerting
• Review and update dependencies

1. Input Validation: Implement comprehensive input validation
2. Rate Limiting: Add rate limiting to prevent abuse
3. Logging: Implement security event logging
4. Monitoring: Set up intrusion detection
5. Backup: Regular automated backups
6. Updates: Keep all dependencies updated
7. SSL/TLS: Use HTTPS everywhere
8. Headers: Configure security headers (HSTS, CSP, etc.)

For security issues, please contact the development team immediately.