@bernierllc/email-ui/SECURITY.md

React UI components for email management, templates, scheduling, and analytics

# Security Documentation

## Input Sanitization

All user inputs are properly sanitized:

### Email Address Validation
- RFC-compliant email address patterns
- Domain validation
- Length restrictions enforced

### HTML Content Sanitization
- XSS attack prevention
- Script tag removal
- Event handler sanitization
- Safe HTML parsing

### File Upload Validation
- File type restrictions
- File size limits
- Content validation
- Malware scanning support

### Template Variable Escaping
- Injection attack prevention
- Safe variable substitution
- Context-aware escaping

## Content Security Policy (CSP)

Components are designed for strict CSP compliance:

### Script Sources
- No inline scripts
- External scripts from trusted domains only
- Nonce-based script loading when required

### Style Sources
- No inline styles (except component-scoped)
- Stylesheet integrity validation
- External styles from trusted domains only

### Resource Loading
- Image sources restricted to trusted domains
- Font loading from approved CDNs only
- No data: URLs for sensitive content

## Data Protection

### In Transit
- All email content encrypted during transmission
- HTTPS enforcement for external requests
- Certificate validation

### At Rest
- No sensitive data in browser storage
- Temporary files cleaned automatically
- Memory cleared after processing

### Audit Logging
- Security events logged (when logger available)
- Access tracking
- Failed authentication attempts
- Suspicious activity detection

## Authentication & Authorization

### Access Control
- Component-level permissions
- Role-based feature access
- Session validation

### Token Security
- Secure token storage
- Automatic token refresh
- Token expiration handling

## Vulnerability Management

### Dependencies
- Regular security audits
- Automated vulnerability scanning
- Timely security updates

### Code Security
- Static code analysis
- Security-focused code reviews
- Penetration testing

## Incident Response

### Logging
- Comprehensive security event logging
- Real-time alerting for critical events
- Log integrity protection

### Monitoring
- Anomaly detection
- Performance monitoring for security impacts
- User behavior analysis

## Compliance

### Standards
- GDPR compliance for user data
- SOC 2 Type II controls
- ISO 27001 alignment

### Privacy
- Data minimization principles
- User consent management
- Right to be forgotten support