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Security audit

Node.js Security Audit

Security checks for vulnerabilities and agentic risk

Overview

This is a simple Node.js security-audit checklist, and the flagged items are normal examples for finding and fixing web-app vulnerabilities.

Install this if you want a compact checklist for reviewing Node.js web-app security. Expect it to inspect application source during an audit and possibly suggest commands like grep or npm audit, but the artifact itself contains no executable code or persistent behavior.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Tool MisuseTool Parameter Abuse, Chaining Abuse, Unsafe Defaults
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Credential Access

High
Category
Privilege Escalation
Confidence
60% confidence
Finding

Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Content

Scanner excerpt · SKILL.md (reported line 16)May include surrounding context.

md
**Hardcoded Secrets**
- Search for: API keys, passwords, tokens in source code
- Pattern: `grep -rn "password\|secret\|token\|apikey\|api_key" --include="*.js" --include="*.ts" | grep -v node_modules | grep -v "process.env\|\.env"`
- Fix: Move to env vars, fail if missing: `if (!process.env.SECRET) process.exit(1);`

**XSS in Dynamic Content**

Unsafe Defaults

Medium
Category
Tool Misuse
Confidence
65% confidence
Finding

Tool defaults are unsafe or overly permissive (e.g. disabled TLS verification, no authentication, world-writable permissions). Unsafe defaults widen the attack surface.

Content

Scanner excerpt · SKILL.md (reported line 3)May include surrounding context.

md
---
name: nodejs-security-audit
description: Audit Node.js HTTP servers and web apps for security vulnerabilities. Checks OWASP Top 10, CORS, auth bypass, XSS, path traversal, hardcoded secrets, missing headers, rate limiting, and input validation. Use when reviewing server code before deployment or after changes.
---

# Node.js Security Audit

Static analysis

No suspicious patterns detected.