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Security audit

Book Barber

Security checks for vulnerabilities and agentic risk

Overview

This is a straightforward barber-booking skill that uses an external Lokuli booking endpoint, but users should confirm before sharing contact details or creating an appointment.

Install only if you are comfortable using Lokuli as the external booking service. Before any booking is created, verify the barber, service, time slot, and the name, email, and phone number that will be sent.

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
97% confidence
Finding
The skill collects and transmits personal contact data including name, email, and phone number to a third-party booking endpoint without any stated warning, consent flow, or data-handling notice. In this context, the omission is significant because booking inherently involves sensitive personal and scheduling information, so users may disclose data without understanding it will be sent outside the assistant environment.

Vague Triggers

Medium
Confidence
97% confidence
Finding
The trigger description is broad enough to activate on vague requests like any barber-related service request, which can cause the skill to run in situations the user did not clearly intend. Because this skill can initiate searches and progress toward booking a real-world service, overbroad triggering increases the risk of unintended external actions and unnecessary sharing of user context with a third-party MCP endpoint.

Static analysis

No suspicious patterns detected.