Security audit

Estat Mcp

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward helper for querying Japan's official e-Stat data API, with a disclosed but ordinary dependency and API-key setup risk.

Before installing, confirm you trust the estat-mcp package source and consider pinning a reviewed version. Use a dedicated e-Stat API key if possible, and run it with normal user privileges rather than elevated system access.

A.I.G

Vulnerability Patterns

Insecure DependenciesIntroduces malicious components through unsafe dependency sources
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

Findings (1)

T08 · Insecure Dependencies

Warning

Location: SKILL.md:6
Finding: Unpinned Third-Party Executable Has Access to an API Credential and Network
Content: View full analysis
Remediation: View remediation

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

Low

Category: Not specified by scanner
Confidence: 78% confidence
Finding: The natural-language description, examples, and recommended search keywords prominently center Japanese terms and examples, which can be read as steering users toward a specific language/locale. While this may be practical for a Japan-specific dataset, the file does not explicitly state that Japanese is required or offer a user choice of language/locale.
Content: No source excerpt is available for this finding.

Rp1

Low

Category: MCP Rug Pull
Confidence: 89% confidence
Finding: The skill instructs users to install estat-mcp without pinning a specific version, which creates a supply-chain risk: future releases could introduce malicious code or breaking changes and would be implicitly trusted by users following the documentation. In this context the risk is somewhat moderated because the package name appears consistent with the skill and there are no additional red-flag instructions, but installation guidance still directly influences what code users execute.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.