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Security audit

PTO Maximizer

Security checks for vulnerabilities and agentic risk

Overview

This local vacation planner has proportionate capabilities, but its holiday assumptions need checking before relying on a plan.

Check proposed holidays against your region and employer, especially Good Friday in French plans, before booking travel or importing events. Choose an export filename that will not overwrite a file you need.

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
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • 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 (2)

Skill declares no tool scope ('permissions' or 'allowed-tools') but code capabilities were detected: file_write.

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

A regional French holiday described as informational is treated as a guaranteed day off for all French plans.

Medium
Category
Excessive Agency
Confidence
99% confidence
Finding

Good Friday is added unconditionally to the French holiday dictionary despite the comment identifying it as regional; downstream planning treats every dictionary entry as a guaranteed day off. In this vacation-planning context, that can produce incorrect PTO budgets, inflated consecutive-break estimates, and misleading calendar exports for users outside the applicable region, potentially causing missed work or wasted travel bookings. This is a planning-data integrity issue, not evidence of malicious behavior or code execution.

Content

No source excerpt is available for this finding.