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Security audit

闲鱼快速检索 Goofish Search

Security checks for vulnerabilities and agentic risk

Overview

This is a browser-assisted shopping search skill with disclosed local result saving and no evidence of hidden execution or data theft.

Before installing, expect the skill to operate in your logged-in Goofish browser session and to save a Markdown file of search results, including item links, to the desktop path shown in the instructions. Review or adjust the save location if you do not want local records of your searches.

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
Vulnerability Patterns
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (4)

Description-Behavior Mismatch

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill’s stated purpose is search/filter/sort, but it also writes a Markdown file to the local desktop. That is an undeclared side effect affecting the local filesystem, which can surprise users, persist potentially sensitive shopping interests, and violate least-privilege expectations for a search-only skill.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill instructs writing search results to /home/k/桌面/... without an explicit warning or consent flow. Silent local persistence can expose private interests, create clutter or overwrite expectations, and is especially risky because the saved file includes direct item links and query-derived filenames.

Content

No source excerpt is available for this finding.

Intent-Code Divergence

Low
Category
Not specified by scanner
Confidence
75% confidence
Finding

The output format block is closed at L255, but another closing code fence appears at L259 after plain bullet lines. This contradicts the apparent documentation intent by presenting malformed markdown, so the documented output structure does not accurately match what is shown.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

This markdown file presents all instructions, labels, and operational notes exclusively in Chinese. Under the policy rule for language or locale constraints, forcing a single language without opt-in can be a natural-language policy issue when no alternative language option or justification is provided.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.