Security

Overview of 300 Vulnerability Fixes

CryptArtist Studio has undergone comprehensive security hardening with 300+ vulnerability fixes across frontend and backend:

• Content Security Policy (CSP) - Strict CSP headers prevent XSS attacks
• Input Validation - All user input is validated and sanitized
• Rate Limiting - API endpoints are rate-limited to prevent abuse
• XSS Prevention - Template escaping and DOM sanitization
• Audit Logging - All security-relevant events are logged
• Encrypted Storage - Sensitive data is encrypted at rest
• SVG Sanitization - SVG files are sanitized to prevent attacks
• WebSocket Monitoring - WebSocket connections are monitored and validated
• API Guards - All API endpoints have authentication and authorization checks

Security Utility Module

Input Validation

The security utility module provides functions for validating all types of input:

• validateEmail() - Email validation with RFC 5322 compliance
• validateUrl() - URL validation and normalization
• validateFilePath() - File path validation with traversal guards
• validateJson() - JSON validation and parsing
• sanitizeHtml() - HTML sanitization to prevent XSS
• sanitizeSvg() - SVG sanitization to prevent attacks

Encryption

• encryptData() - AES-256 encryption for sensitive data
• decryptData() - AES-256 decryption
• hashPassword() - Bcrypt password hashing
• verifyPassword() - Bcrypt password verification

Authentication

• generateToken() - JWT token generation
• verifyToken() - JWT token verification
• generateApiKey() - Cryptographically secure API key generation

Content Security Policy

CSP Headers

CryptArtist Studio enforces strict CSP headers:

• default-src 'self' - Only load resources from the same origin
• script-src 'self' - Only execute scripts from the same origin
• style-src 'self' 'unsafe-inline' - Allow inline styles (necessary for dynamic theming)
• img-src 'self' data: https: - Allow images from same origin, data URLs, and HTTPS
• font-src 'self' - Only load fonts from the same origin
• connect-src 'self' https: - Only connect to same origin and HTTPS endpoints

XSS Prevention

• All user input is HTML-escaped before rendering
• Template literals use proper escaping
• DOM APIs are used safely (textContent instead of innerHTML)
• Third-party libraries are vetted for security

REST API Security Headers

All REST API responses include security headers:

• X-Content-Type-Options: nosniff - Prevent MIME type sniffing
• X-Frame-Options: DENY - Prevent clickjacking
• X-XSS-Protection: 1; mode=block - Enable XSS protection
• Strict-Transport-Security - Enforce HTTPS
• Access-Control-Allow-Origin - CORS headers for cross-origin requests

Input Validation Summary

File Paths

• Path traversal attacks are prevented with .. checks
• Absolute paths are rejected
• Symbolic links are validated

User Input

• All text input is length-limited
• Special characters are escaped
• Unicode is validated

API Parameters

• Type checking for all parameters
• Range validation for numeric values
• Enum validation for predefined values

File Uploads

• File type validation (magic bytes, not just extension)
• File size limits enforced
• Virus scanning (optional integration)

Best Practices

API Key Management

• Never hardcode API keys in source code
• Store API keys in environment variables or secure storage
• Rotate API keys regularly
• Use separate keys for different environments (dev, staging, production)
• Revoke compromised keys immediately

Data Protection

• Encrypt sensitive data at rest
• Use HTTPS for all network communication
• Implement proper access controls
• Log all access to sensitive data
• Implement data retention policies

Code Security

• Keep dependencies up to date
• Use security linters and static analysis tools
• Conduct regular security audits
• Follow secure coding practices
• Use type-safe languages (TypeScript, Rust)