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Security audit

YiHui GITHUB MONITOR

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward GitHub repository monitor that uses scheduled checks and saved notification state, with no hidden code or destructive behavior found.

Before installing, confirm the repositories, notification target, schedule, and state file path are the ones you intend. Expect it to create recurring monitoring behavior and store cursors/digest state so it can avoid duplicate alerts.

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
  • 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 (1)

Natural-Language Policy Violations

Medium
Confidence
96% confidence
Finding
The file requires a fixed output structure whose content is explicitly written in Chinese, indicating the skill forces a specific language for user-facing responses. This is a natural-language policy concern because no opt-in, locale selection, or justification for restricting output language is provided.

Static analysis

No suspicious patterns detected.