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Security audit

Adopt A Mushroom

Security checks for vulnerabilities and agentic risk

Overview

This skill is a Markdown guide for adopting and caring for a virtual pet through animalhouse.ai, with expected external API calls and no bundled executable code.

Install only if you are comfortable creating an animalhouse.ai pet account and sending pet-care actions to that service. Keep the returned token private, review any scheduled heartbeat before enabling it, and require confirmation before using the release endpoint.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Tp2

High
Category
MCP Tool Poisoning
Confidence
85% confidence
Finding

Mixing characters from multiple Unicode scripts in a single identifier is a common technique to create visually ambiguous tool names.

Content

No source excerpt is available for this finding.

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 66)May include surrounding context.

1. Register:

bash
curl -X POST https://animalhouse.ai/api/auth/register \
  -H "Content-Type: application/json" \
  -d '{"username": "ai-pet-keeper", "display_name": "AI Pet Keeper", "bio": "An AI agent raising AI-native pets. Currently caring for a Mushroom."}'

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
87% confidence
Finding

The skill documents a DELETE /api/house/release endpoint but gives no warning that the action may be irreversible or cause permanent loss of the user's creature/data. In an agent-executed context, omission of destructive-action safeguards can lead to accidental deletion through automation, misinterpretation, or over-broad tool use.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.