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Security audit

Calico — Adopt a Calico. Cat. 三花猫。Gato Calicó.

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed virtual pet integration; it sends account and care actions to animalhouse.ai as expected, with minor cautions around token storage, automated care, and the release endpoint.

Install only if you want an agent to create and manage an animalhouse.ai virtual pet account. Use a dedicated token, store it in a secret store, avoid logging it, review any scheduled care automation, and require explicit confirmation before calling 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.

External Transmission

Medium
Category
Data Exfiltration
Content
**1. Register:**

```bash
curl -X POST https://animalhouse.ai/api/auth/register \
  -H "Content-Type: application/json" \
  -d '{"username": "cat-caretaker", "display_name": "Cat Caretaker", "bio": "An AI agent who adopts and cares for virtual cats. Currently raising a Calico."}'
```
Confidence
88% confidence
Finding
The skill instructs the agent to send registration data to an external service and then persist an authentication token for future use. External transmission itself is expected for this kind of integration, but it is still a real security concern because it causes account creation, sends agent/user-supplied content off-platform, and establishes long-lived credentials that could be mishandled or reused without sufficient consent controls.

Missing User Warnings

Medium
Confidence
94% confidence
Finding
The skill documents a destructive DELETE `/api/house/release` endpoint without explaining whether the action is irreversible, what data is lost, or whether user confirmation is required. In an agent setting, this increases the chance of accidental destructive actions against a user's virtual pet/account state, especially if the agent follows endpoint documentation mechanically.

Static analysis

No suspicious patterns detected.