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Security audit

China Work Calendar

Security checks for vulnerabilities and agentic risk

Overview

This is a local China holiday/workday calculator with no network access, credential handling, persistence, or hidden control behavior.

Reasonable to install for Chinese holiday and workday calculations. Treat results as informational and verify important dates against official sources, especially future-year schedules; expect Chinese output and relatively basic planning support.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (3)

Description-Behavior Mismatch

Medium
Confidence
91% confidence
Finding
The manifest describes a broader China holiday/work-planning tool, including holiday countdowns, overtime, vacation planning, and adjusted workday/rest-day guidance. In code, the implemented commands are limited to workday counting, workday checks, listing holidays, a generic target-date countdown, and next-workday lookup; there is no logic specifically for holiday countdowns, overtime calculations, vacation-planning recommendations, or explicit调休换休提示 output.

Natural-Language Policy Violations

Low
Confidence
90% confidence
Finding
The manifest description is written as a Chinese-only capability statement for a general holiday/workday calculator, with no indication that users can choose another language or locale for responses. This can conflict with a language-choice policy because the skill appears to constrain interaction language by default rather than offering user opt-in.

Natural-Language Policy Violations

Low
Confidence
95% confidence
Finding
The script emits fixed Chinese strings for weekday names and workday labels, which imposes a specific language on all users. The policy allows locale constraints when users can opt in or when the limitation is clearly documented and justified, neither of which is present here.

Static analysis

No suspicious patterns detected.