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Security audit

Yuanfenju

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for using Yuanfenju through OOMOL, but its first-time setup includes unverified remote script execution to install the CLI.

Install only if you are comfortable using OOMOL as the intermediary for Yuanfenju and with your Yuanfenju-related inputs being sent through that connector. Avoid having an agent run the remote install commands automatically; install the oo CLI through a trusted, verifiable method and confirm any paid, quota-consuming, write, or destructive action before execution.

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 the agent to install software by piping a remotely fetched script directly into bash. This creates a supply-chain and remote code execution risk: if the install endpoint, transport, or upstream content is compromised, arbitrary code would execute on the host with the user's privileges.

Content

Scanner excerpt · SKILL.md (reported line 66)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The description says to use this skill for "ANY Yuanfenju request" and "Whenever a task involves Yuanfenju," which is an extremely broad activation condition. This can overlap with many ordinary requests that merely mention Yuanfenju and does not provide exclusions or negative examples to clarify when the skill should not activate.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.