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Security audit

Appcues

Security checks for vulnerabilities and agentic risk

Overview

This Appcues skill is mostly coherent, but its setup instructions include running a remote installer script directly in the shell, which should be reviewed before use.

Before installing, verify the oo CLI installer through OOMOL's official documentation or a safer package-manager/checksum flow, and do not let the setup commands run automatically without explicit approval. Once installed, review payloads carefully before allowing Appcues publish or unpublish actions.

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
96% confidence
Finding

The skill instructs users to install software by piping a remotely fetched script directly into bash, which executes unverified code from the network without integrity checking or user review. In a skill context, this is especially risky because the document is operational guidance an agent may follow automatically when setup fails, creating a path to arbitrary code execution if the host, CDN, or transport path is compromised.

Content

Scanner excerpt · SKILL.md (reported line 60)May include surrounding context.

Static analysis

No suspicious patterns detected.