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Security audit

Calctl

Security checks for vulnerabilities and agentic risk

Overview

This skill is a small Apple Calendar command guide whose calendar read and event-creation behavior is disclosed and purpose-aligned.

Before installing, confirm that `calctl add` targets the calendar you intend, especially because the documented default is `Privat`; replace the example calendar names with your own local Apple Calendar names.

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

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
88% confidence
Finding

This markdown file describes a command that creates new calendar events, which affects user data. While the write capability is mentioned functionally, there is no explicit warning or disclosure about modifying the user's calendar or which calendar is targeted by default.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
81% confidence
Finding

The documentation presents locale-specific calendar names such as 'Privat' and 'Familien Kalender' as the common calendars on the system. This can impose a specific language/locale assumption without user opt-in or clarification that the examples are environment-specific.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.