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Security audit

Payhip

Security checks for vulnerabilities and agentic risk

Overview

This Payhip skill is coherent, but its first-time setup tells users to run remotely fetched installer scripts directly in a shell.

Review the oo CLI installer before running it, prefer an official package or verified installer if available, and confirm any Payhip write or destructive action payload before allowing the agent to run it.

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
95% confidence
Finding

The skill instructs the agent/user to install the CLI by piping a remotely fetched script directly into bash, which is a classic supply-chain and remote code execution risk. If the install endpoint, transport, or hosting were compromised, arbitrary code would execute immediately on the local system with the user's privileges.

Content

Scanner excerpt · SKILL.md (reported line 63)May include surrounding context.

Static analysis

No suspicious patterns detected.