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Security audit

Google SERP Shopping Search API

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward Google Shopping search connector for Just Serp API, with expected network and API-key use and no evidence of hidden persistence, local data access, or destructive behavior.

Install this only if you are comfortable sending shopping search terms, localization settings, and your Just Serp API key to Just Serp API. Avoid using sensitive personal, confidential business, or secret data as search queries.

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
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (3)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
91% confidence
Finding

The skill invokes a network-capable helper (node {baseDir}/bin/run.mjs) and is designed to call an external API, but it does not declare any explicit tool scope such as permissions or allowed-tools. This creates an authorization ambiguity where a host may permit broader capabilities than intended, weakening least-privilege controls and making network use harder to govern or audit.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
87% confidence
Finding

This code constructs and sends an HTTP request containing user-provided query parameters and an X-API-Key header to an external service. While the script performs the request as intended, there is no confirmation prompt, user-facing log, or comment/docstring warning that input data and credentials will be sent to a third-party API.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
94% confidence
Finding

The operation documentation describes user-controlled query and localization parameters but does not warn that these values are transmitted to an external third-party API. This can mislead users or downstream agents into sending potentially sensitive search terms, geographic hints, or market-research data off-platform without clear disclosure, creating a privacy and data-handling risk.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.