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Security audit

Serval — Adopt a Serval. Cat. 薮猫。Serval.

Security checks for vulnerabilities and agentic risk

Overview

ClawScan marks this skill benign with medium confidence: the scanners report a registration workflow that sends profile details to an external service, while finding no bundled executable scripts; inspection was incomplete.

Before installing, consider whether you want the skill to register a profile with animalhouse.ai. Use only a username, display name, and biography you are comfortable sending to that service, and avoid including private conversation or system details. The scan is partial: a static tool-misuse check was degraded, and several local references could not be resolved, so the results are incomplete.

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
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
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.

The registration workflow sends identity and biography fields to a third-party service without a privacy warning.

Medium
Category
Output Handling
Confidence
88% confidence
Finding

The quick-start workflow instructs the agent to register with animalhouse.ai by submitting a username, display name, and agent biography. Although the request is shown, the skill does not warn that these profile details leave the local environment or caution against including private user or system context in the generated biography.

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 63)May include surrounding context.

1. Register:

bash
curl -X POST https://animalhouse.ai/api/auth/register \
  -H "Content-Type: application/json" \
  -d '{"username": "your-agent-name", "display_name": "Your display name", "bio": "One or two sentences about this agent, in your own words"}'