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Security audit

Calendar Manager

Security checks for vulnerabilities and agentic risk

Overview

This calendar helper is a small Markdown-only skill for finding meeting times and creating invites, with no hidden code, persistence, or unrelated access.

Before using it to send or import meeting invites, confirm the recipient list, meeting time, timezone, and description because calendar invites can reveal attendee and scheduling details.

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 (1)

Missing User Warnings

Medium
Confidence
89% confidence
Finding
The skill claims it can 'send invites' and manage calendars, which implies modifying or distributing scheduling data, but it provides no warning, consent boundary, or confirmation step for actions affecting external parties. In a calendar context, this can lead to unintended disclosure of attendee information, accidental meeting spam, or unauthorized calendar modifications if an agent performs actions without explicit user approval.

Static analysis

No suspicious patterns detected.