• Location: website_diff/fetcher.py
• Implementation:
  • URL scheme validation (only http/https allowed)
  • Basic SSRF protection with localhost/internal network detection
  • URL parsing using urllib.parse.urlparse for safe parsing
• Status: ✅ Implemented
• Note: Localhost access is allowed for development/testing purposes

• Location: website_diff/cli.py, website_diff/link_traverser.py
• Implementation:
  • URL normalization and validation
  • Filtering of dangerous protocols (javascript:, mailto:, tel:, etc.)
  • Email address detection and filtering
• Status: ✅ Implemented

• Location: All file operations
• Implementation:
  • Uses pathlib.Path for safe path handling
  • Paths are relative to user-specified directories
  • No direct user input used in file paths without validation
• Status: ✅ Safe
• Note: All file operations use Path objects which prevent path traversal

• Status: ✅ Verified
• Findings: No use of eval(), exec(), subprocess with shell=True, or os.system()

• Status: ✅ Verified
• Findings:
  • No passwords, API keys, or tokens in code
  • Secrets only referenced via environment variables in GitHub Actions
  • Docker credentials stored as GitHub secrets

• Status: ✅ Verified
• Findings:
  • All file writes use explicit encoding ('utf-8')
  • Binary file operations use 'wb' mode appropriately
  • No unsafe file permissions set

1. SSRF Protection Enhancement (Medium Priority)

   • Consider implementing a more robust SSRF protection mechanism
   • Add option to disable localhost access in production environments
   • Implement IP address whitelist/blacklist functionality

2. Rate Limiting (Low Priority)

   • Consider adding rate limiting for web requests to prevent abuse
   • Implement request throttling for link traversal

3. Content Size Limits (Low Priority)

   • Add maximum content size limits to prevent memory exhaustion
   • Implement streaming for very large files

If you discover a security vulnerability, please report it via:

• GitHub Security Advisories: https://github.com/GeiserX/Website-Diff/security/advisories
• Email: sergio@geiser.cloud

Please include:

• Description of the vulnerability
• Steps to reproduce
• Potential impact
• Suggested fix (if available)

1. Secrets Management

   • Never commit secrets to the repository
   • Use environment variables or secret management tools
   • Rotate credentials regularly

2. Network Security

   • Be cautious when comparing URLs from untrusted sources
   • Use the tool in isolated environments when testing unknown websites
   • Monitor network traffic when using the tool

3. File System Security

   • Use dedicated directories for reports and screenshots
   • Review generated files before sharing
   • Clean up generated artifacts regularly

• No hardcoded secrets
• URL validation implemented
• SSRF protection (basic)
• Path traversal protection (via Path objects)
• No command injection vectors
• Safe file operations
• Input sanitization
• Proper error handling
• No unsafe deserialization
• Dependencies up to date