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Security audit

Metaso

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for using Metaso through OOMOL, but its setup instructions tell the agent to install the CLI by executing a remote script directly in the shell.

Review the oo CLI installation path before installing. Prefer official, version-pinned installation instructions with checksum or signature verification, and do not let an agent run the curl|bash or irm|iex setup commands automatically. Once the CLI is already installed and connected, the skill's Metaso operations are scoped and disclosed.

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
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The skill instructs the agent to install software by piping a remotely fetched script directly into a shell (curl ... | bash). This is dangerous because the downloaded content is executed without verification, integrity checking, pinning, or user review; if the remote endpoint, CDN, DNS, or transport path is compromised, arbitrary code can run on the host.

Content

Scanner excerpt · SKILL.md (reported line 58)May include surrounding context.

Static analysis

No suspicious patterns detected.