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Security audit

Yahoo

Security checks across malware telemetry and agentic risk

Overview

This Yahoo Finance skill is purpose-aligned and disclosed, but users should understand that it runs local Python scripts, sends ticker/search queries to Yahoo, and can optionally save local finance notes.

Install only if you are comfortable sending ticker symbols and finance search terms to Yahoo Finance. Approve creation of ~/yahoo/ or AGENTS.md routing only if you want persistent finance context, and do not store broker credentials, account numbers, tax records, or exact holdings in the skill memory.

SkillSpector

By NVIDIA
Vulnerability Patterns
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • 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
Findings (1)

Lp3

Medium
Category
MCP Least Privilege
Confidence
89% confidence
Finding
The skill describes file reads from `~/yahoo/` and outbound network access to Yahoo Finance, but it does not declare explicit permissions for those capabilities. Undeclared capabilities weaken user consent and platform enforcement because the skill can access local data and make external requests without a clear permission contract. In this context the behavior is somewhat bounded by the documentation, but the absence of formal permission declarations still creates a real transparency and policy gap.

VirusTotal

66/66 vendors flagged this skill as clean.

View on VirusTotal