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Security audit

ACT

Security checks for vulnerabilities and agentic risk

Overview

This ACT prep skill is a plain Markdown study assistant with disclosed local progress files and no evidence of hidden execution, network access, credential use, or destructive behavior.

Before installing, users should be comfortable with ACT study information being saved locally in ~/act/. Review or delete that folder if it contains scores, target schools, test dates, or other planning details you no longer want retained.

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 (2)

Missing User Warnings

Low
Confidence
93% confidence
Finding
The skill explicitly directs storage of user data under ~/act/ but does not warn the user that study history, target colleges, test dates, and performance information will persist locally. While this is not an overtly malicious behavior, undisclosed persistence can expose sensitive educational and planning data to other local users, backups, or later unintended reuse.

Natural-Language Policy Violations

Low
Confidence
93% confidence
Finding
The document contains a section explicitly labeled "English" without offering any language or locale choice. Under the stated policy, forcing a specific language without user opt-in is a natural-language policy concern unless the constraint is clearly documented and justified.

Static analysis

No suspicious patterns detected.