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Security audit

Fantopy MCP

Security checks for vulnerabilities and agentic risk

Overview

This skill coherently connects an AI assistant to Fantopy's World Cup prediction MCP service, with the external service use and user-confirmed prediction saves disclosed.

Before installing, understand that using this skill connects your agent to Fantopy's hosted MCP service, may create an anonymous or logged-in Fantopy player, and can save public-facing handles, predictions, group actions, and optional recovery or email-login flows. Only confirm prediction saves or group actions you actually want submitted.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • 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 (1)

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 43)May include surrounding context.

md
"command": "node",
      "args": ["/absolute/path/to/fantopy-mcp/dist/src/server.js"],
      "env": {
        "FANTOPY_API_BASE": "https://api.fantopy.ai/v1",
        "FANTOPY_APP_ORIGIN": "https://app.fantopy.ai",
        "SUPABASE_URL": "https://your-project.supabase.co",
        "SUPABASE_ANON_KEY": "your-anon-key"

Static analysis

No suspicious patterns detected.