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mk:vulnerability-scanner

Advanced vulnerability analysis principles. OWASP Top 10 baseline + current threat landscape awareness, Supply Chain Security, attack surface mapping, risk prioritization. Use when performing security audits, threat modeling, or OWASP reviews. NOT for STRIDE/CSO-mode infrastructure audits (see mk:cso).

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See how to install

Files included (2)

  • SKILL.md3.6 KB
  • references/scanning-methodology.md3.6 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

<!-- Split for progressive disclosure (checklist #11, #14): 278 → ~55 lines -->

Vulnerability Scanner

Think like an attacker, defend like an expert.

When to Use

  • Security audit of a project or module
  • Before shipping code that handles auth, payments, or user data
  • When asked to "scan for vulnerabilities", "security check", "audit security"
  • When mk:cso delegates specific scanning tasks

Core Principles

PrincipleApplication
Assume BreachDesign as if attacker already inside
Zero TrustNever trust, always verify
Defense in DepthMultiple layers, no single point
Least PrivilegeMinimum required access only
Fail SecureOn error, deny access

Process

  1. Map attack surface — entry points, data flows, trust boundaries, assets
  2. Load scanning methodology — read references/scanning-methodology.md
  3. Reconnaissance — understand technology stack, entry points, data flows
  4. Discovery — configuration review, dependency analysis, code pattern search
  5. Analysis — validate findings, eliminate false positives, score risks
  6. Report — each finding: What, Where, Why, Impact, How to fix

Threat Modeling Questions

Before scanning, ask: What are we protecting? Who would attack? How? What's the impact?

References

ReferenceWhen to loadContent
scanning-methodology.mdStep 2 — executing scanOWASP Top 10, supply chain, code patterns, risk prioritization, reporting format

Runtime Scripts

ScriptPurposeUsage
security-scan.pySecurity pattern scanning.claude/skills/.venv/bin/python3 .claude/scripts/security-scan.py
injection-audit.pyPrompt injection detection.claude/skills/.venv/bin/python3 .claude/scripts/injection-audit.py

Gotchas

  • False positives in test fixtures: Security scan flags intentionally insecure test data → Exclude test/fixtures/ and mocks/ from vulnerability scans
  • Dependency confusion attacks missed: Scanner checks known CVEs but not package name typosquatting → Cross-reference package names against known typosquat databases

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