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Security audit

McDonald's China MCP

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for using McDonald's China through OOMOL, but its fallback setup tells the agent to run remote installer scripts directly in a shell.

Review the oo CLI installation path before using this skill. Prefer an official package or installer you can verify, and do not allow automatic execution of the curl/PowerShell installer unless you trust OOMOL's installer source. For normal connector use, confirm any address, coupon, points, or order-changing action before it runs.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

External Script Fetching

High
Category
Supply Chain
Confidence
95% confidence
Finding

The skill instructs users to install software by piping a remotely fetched script directly into a shell (curl ... | bash). This creates a supply-chain and remote-code-execution risk: if the server, CDN, DNS, TLS trust chain, or hosting account is compromised, arbitrary code will run on the user's machine without review. In a skill context, this is more dangerous because the content is framed as an operational fallback step that an agent or user may follow automatically during setup failures.

Content

Scanner excerpt · SKILL.md (reported line 56)May include surrounding context.

Static analysis

No suspicious patterns detected.