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Security audit

Google SERP Trends Autocomplete API

Security checks for vulnerabilities and agentic risk

Overview

This skill is a narrow Just Serp API wrapper for one Google Trends autocomplete endpoint, with no evidence of hidden persistence, destructive behavior, or unrelated data access.

Install only if you intend to let the agent query Just Serp API using your JUST_SERP_API_KEY. Treat query text as data sent to that provider, and prefer a limited-scope or revocable API key if available.

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 Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • 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 (1)

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
90% confidence
Finding

The skill invokes a network-capable helper (node {baseDir}/bin/run.mjs) and requires an API key, but it does not declare an explicit tool scope such as permissions or allowed-tools. This weakens platform-level enforcement and review by making outbound network access implicit rather than explicitly constrained, which can allow broader or unexpected external communication if the runtime or wrapper changes.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.