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Security48k · #4523

vulnerability-scanner

Lets your agent deeply analyze security vulnerabilities. It helps map weaknesses and prioritize risks to protect systems.

What it does

This tool helps find security weaknesses in systems and software. It analyzes how an attacker would think to identify weak points before they are exploited.

When to use it

  • ✓When launching a new application.
  • ✓After making major updates to a system.
  • ✓Periodically to check security.

Example of what to ask your AI

“Analyze the security of my web project.”

Want more? Open the sections below.

How to use

The easiest way: copy the message below and paste it into Claude, ChatGPT, Cursor or any AI. It reads the skill and follows the instructions.

Skill link

https://github.com/sickn33/agentic-awesome-skills/blob/main/plugins/agentic-awesome-skills-claude/skills/vulnerability-scanner/SKILL.md

Ready-to-paste message

Use this skill to help me: https://github.com/sickn33/agentic-awesome-skills/blob/main/plugins/agentic-awesome-skills-claude/skills/vulnerability-scanner/SKILL.md Read the SKILL.md file at that link and follow its instructions for my task.
How it works

It uses known security checklists (like OWASP Top 10) and analyzes your project's code and configuration to find common issues.

Installation

Easiest way: copy the skill link and paste it into Claude, ChatGPT or Cursor asking it to follow the instructions.

In the terminal (Claude Code, Codex, Cursor), in your project folder:

npx skills add sickn33/agentic-awesome-skills --skill vulnerability-scanner

Or download just the file:

curl -L https://raw.githubusercontent.com/sickn33/agentic-awesome-skills/main/plugins/agentic-awesome-skills-claude/skills/vulnerability-scanner/SKILL.md -o SKILL.md
Technical content (original SKILL.md)

Original text by the author, straight from GitHub.

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 <project_path>

📋 Reference Files

File Purpose
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 <7.0 → Schedule for later

6. Exceptional Conditions (A10 - New)

Fail-Open vs Fail-Closed

Scenario Fail-Open (BAD) Fail-Closed (GOOD)
Auth error Allow access Deny access
Parsing fails Accept input Reject input
Timeout Retry forever Limit + abort

What to Check

  • Exception handlers that catch-all and ignore
  • Missing error handling on security operations
  • Race conditions in auth/authz
  • Resource exhaustion scenarios

7. Scanning Methodology

Phase-Based Approach

1. RECONNAISSANCE
   └── Understand the target
       ├── Technology stack
       ├── Entry points
       └── Data flows

2. DISCOVERY

…
FAQ

What is OWASP Top 10?

It's a list of the 10 most critical security flaws found in web applications.

What is 'Supply Chain Security'?

It's the security of third-party tools and libraries you use in your project. If they are compromised, your project can be too.

How do I know if an issue is serious?

The tool helps prioritize issues based on severity (CVSS), likelihood of exploitation, and the value of what's at risk.

Details

Original description by the author

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

repo: sickn33/agentic-awesome-skills

Popularity

GitHub stars
48k
Ranking position
#4523
License
MIT
Updated
10/15/2026

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