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Security audit

App Store API

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward paid Apple App Store data API guide with the cost and authentication model disclosed.

Install only if you intend to use a paid fetcher.sh App Store API. Confirm before repeated or automated calls, protect any FETCHER_API_KEY like a payment credential, and understand that x402 or prepaid-credit use may spend funds even though each listed call is low cost.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (1)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The skill does involve paid API usage, and while pricing details appear later in the document, the skill description does not prominently warn users that routine calls may spend prepaid credits or trigger pay-per-call charges. In an agent setting, insufficient upfront disclosure can lead to unintended spending because an agent may invoke the skill automatically based on the description alone.

Content

No source excerpt is available for this finding.

Static analysis

Detected: suspicious.exposed_secret_literal

File appears to expose a hardcoded API secret or token.

Critical
Code
suspicious.exposed_secret_literal
Location
SKILL.md:42