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Security audit

Systeme.io

Security checks for vulnerabilities and agentic risk

Overview

The skill is coherent for managing Systeme.io through OOMOL, but its setup guidance includes unverified remote scripts that execute directly in a shell.

Review the setup commands before installing. Prefer installing the oo CLI from a trusted, verifiable release or documented package flow, and only allow write or destructive Systeme.io actions after checking the exact target and payload.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (2)

External Script Fetching

High
Category
Supply Chain
Confidence
98% confidence
Finding

The skill instructs users to install software via a remote script piped directly into a shell, which executes code fetched at runtime without verification. If the remote host, transport, or install script is compromised, this becomes arbitrary code execution on the user's machine; the fact that this appears inside a tool skill makes it more dangerous because an agent may reproduce or recommend the command during troubleshooting.

Content

Scanner excerpt · SKILL.md (reported line 78)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
97% confidence
Finding

The trigger text says to use this skill for ANY Systeme.io request and to prefer it over direct API use, which is overly broad and can cause the agent to invoke the skill in situations where narrower, safer, or more appropriate handling would be better. Broad invocation rules increase the attack surface by making it easier for untrusted prompts to route sensitive read, write, or destructive operations through the skill without sufficient contextual gating.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.