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Security audit

Book Guitar Lessons

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward guitar-lesson booking connector, with some privacy and confirmation caveats but no hidden code, persistence, or deceptive behavior.

Before installing, understand that this skill connects to Lokuli's external MCP service and may use your contact details to create a lesson booking. Confirm provider, time, name, email, and phone before allowing any booking call.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (2)

Missing User Warnings

High
Confidence
98% confidence
Finding
The skill explicitly supports transmitting customerName, customerEmail, and customerPhone to an external Lokuli MCP service, but the skill text provides no disclosure, consent guidance, or privacy warning. This creates a real risk of collecting and sending sensitive personal contact data to a third party without clear user awareness or informed consent.

Vague Triggers

Medium
Confidence
95% confidence
Finding
The trigger language is broad enough to activate on generic guitar-related service requests, which can cause the agent to invoke an external booking workflow when the user may only be seeking information or recommendations. Because this skill connects to a third-party MCP endpoint capable of booking services, over-triggering increases the chance of unintended external actions and unnecessary data sharing.

Static analysis

No suspicious patterns detected.