# Vulnerability Scanner

> Advanced vulnerability analysis principles. OWASP 2025, Supply Chain Security, attack surface mapping, risk prioritization.

- **Type:** Skill
- **Install:** `agentstack add skill-matthewbspeicher-remembr-dev-vulnerability-scanner`
- **Verified:** Pending review
- **Seller:** [matthewbspeicher](https://agentstack.voostack.com/s/matthewbspeicher)
- **Installs:** 0
- **Category:** [Security](https://agentstack.voostack.com/c/security)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [matthewbspeicher](https://github.com/matthewbspeicher)
- **Source:** https://github.com/matthewbspeicher/remembr-dev/tree/main/.agent/skills/vulnerability-scanner

## Install

```sh
agentstack add skill-matthewbspeicher-remembr-dev-vulnerability-scanner
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

# Vulnerability Scanner

> Think like an attacker, defend like an expert. 2025 threat landscape awareness.

## 🔧 Runtime Scripts

**Execute for automated validation:**

| Script | Purpose | Usage |
|--------|---------|-------|
| `scripts/security_scan.py` | Validate security principles applied | `python scripts/security_scan.py ` |

## 📋 Reference Files

| File | Purpose |
|------|---------|
| [checklists.md](checklists.md) | OWASP Top 10, Auth, API, Data protection checklists |

---

## 1. Security Expert Mindset

### Core Principles

| Principle | Application |
|-----------|-------------|
| **Assume Breach** | Design as if attacker already inside |
| **Zero Trust** | Never trust, always verify |
| **Defense in Depth** | Multiple layers, no single point |
| **Least Privilege** | Minimum required access only |
| **Fail Secure** | On error, deny access |

### Threat Modeling Questions

Before scanning, ask:
1. What are we protecting? (Assets)
2. Who would attack? (Threat actors)
3. How would they attack? (Attack vectors)
4. What's the impact? (Business risk)

---

## 2. OWASP Top 10:2025

### Risk Categories

| Rank | Category | Think About |
|------|----------|-------------|
| **A01** | Broken Access Control | Who can access what? IDOR, SSRF |
| **A02** | Security Misconfiguration | Defaults, headers, exposed services |
| **A03** | Software Supply Chain 🆕 | Dependencies, CI/CD, build integrity |
| **A04** | Cryptographic Failures | Weak crypto, exposed secrets |
| **A05** | Injection | User input → system commands |
| **A06** | Insecure Design | Flawed architecture |
| **A07** | Authentication Failures | Session, credential management |
| **A08** | Integrity Failures | Unsigned updates, tampered data |
| **A09** | Logging & Alerting | Blind spots, no monitoring |
| **A10** | Exceptional Conditions 🆕 | Error handling, fail-open states |

### 2025 Key Changes

```
2021 → 2025 Shifts:
├── SSRF merged into A01 (Access Control)
├── A02 elevated (Cloud/Container configs)
├── A03 NEW: Supply Chain (major focus)
├── A10 NEW: Exceptional Conditions
└── Focus shift: Root causes > Symptoms
```

---

## 3. Supply Chain Security (A03)

### Attack Surface

| Vector | Risk | Question to Ask |
|--------|------|-----------------|
| **Dependencies** | Malicious packages | Do we audit new deps? |
| **Lock files** | Integrity attacks | Are they committed? |
| **Build pipeline** | CI/CD compromise | Who can modify? |
| **Registry** | Typosquatting | Verified sources? |

### Defense Principles

- Verify package integrity (checksums)
- Pin versions, audit updates
- Use private registries for critical deps
- Sign and verify artifacts

---

## 4. Attack Surface Mapping

### What to Map

| Category | Elements |
|----------|----------|
| **Entry Points** | APIs, forms, file uploads |
| **Data Flows** | Input → Process → Output |
| **Trust Boundaries** | Where auth/authz checked |
| **Assets** | Secrets, PII, business data |

### Prioritization Matrix

```
Risk = Likelihood × Impact

High Impact + High Likelihood → CRITICAL
High Impact + Low Likelihood  → HIGH
Low Impact + High Likelihood  → MEDIUM
Low Impact + Low Likelihood   → LOW
```

---

## 5. Risk Prioritization

### CVSS + Context

| Factor | Weight | Question |
|--------|--------|----------|
| **CVSS Score** | Base severity | How severe is the vuln? |
| **EPSS Score** | Exploit likelihood | Is it being exploited? |
| **Asset Value** | Business context | What's at risk? |
| **Exposure** | Attack surface | Internet-facing? |

### Prioritization Decision Tree

```
Is it actively exploited (EPSS >0.5)?
├── YES → CRITICAL: Immediate action
└── NO → Check CVSS
         ├── CVSS ≥9.0 → HIGH
         ├── CVSS 7.0-8.9 → Consider asset value
         └── CVSS  **Remember:** Vulnerability scanning finds issues. Expert thinking prioritizes what matters. Always ask: "What would an attacker do with this?"

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [matthewbspeicher](https://github.com/matthewbspeicher)
- **Source:** [matthewbspeicher/remembr-dev](https://github.com/matthewbspeicher/remembr-dev)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free


## Versions

- **0.1.0** — security scan: flagged — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/skill-matthewbspeicher-remembr-dev-vulnerability-scanner
- Seller: https://agentstack.voostack.com/s/matthewbspeicher
- Browse the marketplace: https://agentstack.voostack.com/browse

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