Extension Security Checklist

This guide provides a comprehensive checklist for evaluating the security of browser extensions, VS Code extensions, and Microsoft 365 apps.

Before Installation

🔍 Source Verification

• Official Source: Download from official marketplaces only
• Developer Reputation: Research the developer's history and reputation
• Review Score: Check user ratings and recent reviews
• Download Count: Verify reasonable download numbers
• Update Frequency: Ensure regular updates and maintenance

📋 Permission Analysis

• Minimum Permissions: Verify extensions request only necessary permissions
• Permission Rationale: Understand why each permission is needed
• Host Permissions: Review website access requirements
• Data Access: Check what data the extension can access
• Background Access: Verify background processing needs

🔒 Security Indicators

• Recent Updates: Check for recent security patches
• Code Transparency: Look for open-source code when available
• Security Audit: Verify if the code has been audited
• Vulnerability Reports: Search for reported security issues
• Community Trust: Check community feedback and discussions

During Installation

⚙️ Installation Settings

• Custom Installation: Use custom installation when available
• Permissions Review: Carefully review permission requests
• Data Access: Understand what data will be accessed
• Automatic Updates: Configure update preferences
• Isolation: Use sandboxing when possible

🛡️ Security Configuration

• Least Privilege: Configure with minimal necessary permissions
• Network Access: Restrict network connections when possible
• File Access: Limit file system access
• Browser Settings: Configure browser-specific security settings
• Extension Settings: Review and configure extension-specific settings

After Installation

🔍 Ongoing Monitoring

• Behavior Monitoring: Monitor for unusual behavior
• Resource Usage: Check CPU and memory usage
• Network Traffic: Monitor network connections
• Permission Changes: Watch for permission changes
• Data Access: Monitor data access patterns

📊 Risk Assessment

• Security Scoring: Use security analysis tools like RiskyPlugins
• Regular Scans: Perform regular security scans
• Vulnerability Tracking: Track new vulnerabilities
• Update Monitoring: Monitor security updates
• Performance Impact: Assess performance impact

🔄 Maintenance

• Regular Updates: Keep extensions updated
• Security Patches: Apply security patches promptly
• Configuration Review: Regularly review security settings
• Usage Audit: Audit extension usage regularly
• Cleanup: Remove unused extensions

Organization-Level Checklist

🏢 Enterprise Policies

• Extension Policy: Establish clear extension policies
• Allowlist: Use allowlist for approved extensions
• Blocklist: Maintain blocklist of dangerous extensions
• Central Management: Use centralized extension management
• Compliance: Ensure regulatory compliance

🔐 Security Controls

• Access Control: Implement proper access controls
• Audit Logging: Maintain comprehensive audit logs
• Incident Response: Establish incident response procedures
• Security Training: Provide security awareness training
• Regular Assessments: Conduct regular security assessments

Red Flags

🚨 Immediate Removal Required

• Malware Detection: Any detected malware or malicious code
• Data Theft: Evidence of data theft or unauthorized access
• System Compromise: Signs of system compromise
• Unauthorized Changes: Unauthorized system or setting changes
• Performance Issues: Severe performance degradation

⚠️ Investigate Further

• Unusual Network Activity: Unexpected network connections
• High Resource Usage: Excessive CPU or memory usage
• Permission Bloat: Unnecessary or excessive permissions
• Poor Maintenance: Lack of updates or maintenance
• Community Warnings: Community security warnings

RiskyPlugins Integration

📊 Automated Analysis

• Use RiskyPlugins for automated extension analysis
• Monitor risk scores and security findings
• Track security trends over time
• Set up alerts for security issues
• Generate security reports

🔄 Continuous Monitoring

• Integrate with CI/CD pipelines
• Automate security scans
• Monitor extension updates
• Track security metrics
• Maintain security dashboards

Best Practices

✅ Recommended Practices

• Regular Reviews: Regularly review installed extensions
• Security First: Prioritize security over functionality
• Documentation: Maintain documentation of extension usage
• Training: Provide security training to users
• Monitoring: Implement continuous security monitoring

❌ Avoid These Practices

• Installing from unofficial sources
• Ignoring permission requests
• Skipping security reviews
• Using outdated extensions
• Disabling security features

Conclusion

This checklist provides a comprehensive framework for evaluating and maintaining extension security. Regular use of this checklist, combined with tools like RiskyPlugins, will help ensure a secure extension ecosystem.

Remember that security is an ongoing process, not a one-time implementation. Stay vigilant, keep your extensions updated, and regularly review your security practices.

For additional security guidance, explore our other guides and documentation.