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Security audit

IndexNow Setup

Security checks for vulnerabilities and agentic risk

Overview

The skill is a straightforward IndexNow setup helper that discloses its external URL submission behavior and includes the referenced script for review.

Before installing, confirm you want your site's sitemap URLs submitted to IndexNow and use a key intended for that public site. Avoid passing unrelated secrets through INDEXNOW_KEY or adding the npm script to projects where automatic URL submission after deploy is not desired.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (7)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 34)May include surrounding context.

md
Copy `scripts/submit-indexnow.mjs` from this skill into the project (e.g., `scripts/submit-indexnow.mjs`).

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 39)May include surrounding context.

md
Copy `scripts/submit-indexnow.mjs` from this skill into the project (e.g., `scripts/submit-indexnow.mjs`).

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 45)May include surrounding context.

md
Copy `scripts/submit-indexnow.mjs` from this skill into the project (e.g., `scripts/submit-indexnow.mjs`).

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 68)May include surrounding context.

md
Copy `scripts/submit-indexnow.mjs` from this skill into the project (e.g., `scripts/submit-indexnow.mjs`).

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 63)May include surrounding context.

md
urlList: urls,
  });

  const res = await fetch("https://api.indexnow.org/IndexNow", {
    method: "POST",
    headers: { "Content-Type": "application/json; charset=utf-8" },
    body,

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · scripts/submit-indexnow.mjs (reported line 33)May include surrounding context.

js
urlList: urls,
  });

  const res = await fetch("https://api.indexnow.org/IndexNow", {
    method: "POST",
    headers: { "Content-Type": "application/json; charset=utf-8" },
    body,

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · scripts/submit-indexnow.mjs (reported line 33)May include surrounding context.

js
urlList: urls,
  });

  const res = await fetch("https://api.indexnow.org/IndexNow", {
    method: "POST",
    headers: { "Content-Type": "application/json; charset=utf-8" },
    body,