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Security audit

AppStore Rating Pulse

Security checks for vulnerabilities and agentic risk

Overview

This skill only fetches public App Store rating data from Apple for user-configured apps, with an optional disclosed daily schedule.

Before installing, confirm you are comfortable running a local shell script that makes HTTPS requests to Apple's public lookup API for the app IDs and countries you configure. Use the optional cron setup only if you want recurring reports, and keep it limited to this script.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (4)

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 12)May include surrounding context.

md
Edit `scripts/fetch-ratings.sh` with your apps and regions:

Ae1

High
Category
analysis-evasion
Confidence
100% confidence
Finding

Referenced artifact was not completely inspected

Content

Scanner excerpt · SKILL.md (reported line 52)May include surrounding context.

md
Edit `scripts/fetch-ratings.sh` with your apps and regions:

External Script Fetching

High
Category
Supply Chain
Confidence
90% confidence
Finding

Remote code is downloaded and executed. This bypasses code review and could introduce malicious code.

Content

Scanner excerpt · scripts/fetch-ratings.sh (reported line 35)May include surrounding context.

sh
local countryName
  countryName=$(country_name "$region")
  local result
  result=$(curl -s --max-time 10 "https://itunes.apple.com/lookup?id=${appId}&country=${region}" | python3 -c "
import sys, json
try:
    d = json.load(sys.stdin)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
92% confidence
Finding

The skill instructs users to run a shell script and configure a cron job, but it does not declare any explicit tool scope or permissions boundary. This creates ambiguity about what execution capabilities the skill expects and can allow broader-than-necessary shell access in environments that enforce permissions from metadata, increasing the risk of unintended command execution or misuse if the skill is modified or invoked automatically.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.