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Security audit

Stock Tech Analysis

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed stock-analysis helper that fetches public Yahoo Finance price data and prints technical indicators, with no hidden persistence or destructive behavior found.

Before installing, understand that running the script will contact Yahoo Finance for stock chart data and print analysis in Chinese. Treat its buy/hold/sell-style signals as educational only, not financial advice, and note that custom ticker arguments appear documented but not implemented in the inspected script.

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
  • 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 (2)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
89% confidence
Finding

The skill documentation indicates it fetches Yahoo Finance data over the network, but the manifest shown in SKILL.md does not declare any explicit tool scope such as permissions or allowed-tools. This creates a transparency and policy-enforcement gap: a reviewer or runtime may not have a clear, least-privilege declaration for outbound network access, increasing the chance of unintended external communication or misuse if the skill is expanded later.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The script's user-facing messages, labels, and disclaimer are consistently hard-coded in Chinese, including status output and analysis summaries. This forces a specific language on users without opt-in or configuration, which matches the language/locale policy violation criteria.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.