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Security audit

China Stock Analysis Custom

Security checks for vulnerabilities and agentic risk

Overview

This markdown-only skill provides stock-analysis guidance with minor scope and language mismatches, but no code, persistence, credential handling, or hidden behavior.

Install only if you want a Chinese-market-oriented stock analysis helper. Be aware it may also discuss U.S. stocks despite the China-focused name, and its templates default to Chinese. Treat any buy, hold, or sell output as informational only, not personalized financial advice.

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
Vulnerability Patterns
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • 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 (4)

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The manifest description limits the skill to Chinese stock prices, specifically A-shares and HK stocks. However, the supported markets table in the skill documentation states that US tickers such as AAPL, TSLA, and NVDA are supported, which expands the behavior beyond the declared scope.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
89% confidence
Finding

The skill prescribes a Chinese search query format ("{股票名称} 股价 今日") and the response template is written in Chinese, which indicates a default language constraint. Because the file does not offer an opt-in or alternative language choice, this is a natural-language policy concern under the language/locale rule.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
87% confidence
Finding

The document is primarily written in Chinese and includes Chinese-only search phrases and labels, while the title and some section headers are in English. This creates a language/locale constraint without any indication that the user can choose another language or locale, which matches the policy concern for forced language use.

Content

No source excerpt is available for this finding.

Description-Behavior Mismatch

Low
Category
Not specified by scanner
Confidence
97% confidence
Finding

The manifest says the skill analyzes Chinese stock prices, specifically A-shares and Hong Kong stocks. This reference file expands the scope to U.S. stocks and general U.S. tech giants, which is broader than the stated skill purpose and could steer the skill into recommendations outside its declared domain.

Content

No source excerpt is available for this finding.