Security Scan Skill

Purpose

Identify and prevent security vulnerabilities.

OWASP Top 10 Checklist

Reference: checklists/owasp-top-10.md

A01: Broken Access Control

• Authorization on all endpoints
• Deny by default
• Rate limiting implemented
• CORS properly configured

A02: Cryptographic Failures

• Data encrypted in transit (HTTPS)
• Sensitive data encrypted at rest
• Strong algorithms used
• Keys properly managed

A03: Injection

• Parameterized queries
• Input validation
• Output encoding
• No eval() with user input

Authentication Checklist

Reference: checklists/auth-security.md

• Passwords hashed (bcrypt/argon2)
• Session properly managed
• Tokens securely stored
• Logout invalidates session

Data Validation Checklist

Reference: checklists/data-validation.md

• All input validated
• Type checking enforced
• Size limits set
• Format validation done

Automated Scan Script

Run: scripts/security-scan.sh

#!/bin/bash
# Run dependency audit
npm audit

# Run static analysis (if available)
npx eslint --plugin security .

# Check for secrets
npx secretlint .

Vulnerability Severity Levels

Critical

• Remote code execution
• SQL injection
• Authentication bypass
• Sensitive data exposure

High

• Cross-site scripting (XSS)
• Cross-site request forgery (CSRF)
• Insecure deserialization
• Privilege escalation

Medium

• Information disclosure
• Missing encryption
• Weak session management
• Insufficient logging

Low

• Missing security headers
• Verbose error messages
• Outdated dependencies (no known exploits)

Security Report Format

Save to: docs/reviews/security-audit-{session}.md

Remediation Process

1. Critical/High: Fix immediately, block merge
2. Medium: Fix before release
3. Low: Track in backlog

Best Practices

Do

• Use parameterized queries
• Validate all input
• Encode all output
• Use security headers
• Keep dependencies updated

Don't

• Hardcode secrets
• Trust user input
• Expose stack traces
• Use weak algorithms
• Skip authentication checks