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Security audit

MCP for Beginners

Security checks for vulnerabilities and agentic risk

Overview

This is a small Chinese-language learning skill that points users to Microsoft's public MCP beginner course and does not install code or request privileged access.

This skill appears safe to install from a security perspective. Before following its quick-start steps, note that the instructions are in Chinese and that cloning the linked GitHub repository or joining Discord are separate user-directed external actions.

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
  • 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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (2)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
90% confidence
Finding

The README content is presented entirely in Chinese, including the overview and usage sections, with no indication that this skill is region-specific or that alternative language options are available. This can violate a language/locale policy when users are not given an explicit language choice or opt-in.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The natural-language content of the skill, including its description and usage instructions, is entirely in Chinese. This can functionally force a specific language on users without opt-in, which matches the language/locale policy violation criteria for natural-language content.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.