Security audit

yumstock

Security checks for vulnerabilities and agentic risk

Overview

This is a single markdown stock-analysis skill whose web/data access is disclosed and aligned with producing current market research.

Install only if you are comfortable with the agent querying external financial and macro data sources for tickers you ask about. Treat its Buy/Hold/Sell outputs as educational analysis, not as trading instructions or professional financial advice.

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 (2)

Missing User Warnings

Low

Confidence: 92% confidence
Finding: The skill explicitly directs the agent to use web search, tools, or APIs to fetch live market and macro data, but it does not require disclosure or consent before initiating outbound requests. In an agent environment, this can cause unexpected network access, reveal user interest or prompts to third parties, and create privacy/compliance issues even if the retrieved data itself is non-sensitive.

Natural-Language Policy Violations

Low

Confidence: 88% confidence
Finding: The skill is primarily written in English but introduces Chinese terminology such as '量价结构确认' and later '低估型启动' and '热门行业回调' without stating that bilingual output is optional or user-selected. This can impose a locale/language expectation on users who did not opt in to Chinese labels.

Static analysis

No suspicious patterns detected.