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Security audit

google-contacts

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Google Contacts integration that includes clearly labeled Maton automation reference material and requires user approval for sensitive actions.

Before installing, be aware that this skill can change or delete Google Contacts data and can set up persistent Maton automations if you approve them. Use the narrowest Google account/scopes, confirm every write or automation, and avoid third-party destinations unless you understand exactly what data will be forwarded.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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 (2)

Context-Inappropriate Capability

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The manifest says this skill is for Google Contacts API operations and explicitly states Google Contacts is not an event source. This file documents Linear webhook events, payloads, scoping, and downstream forwarding considerations, which is a separate third-party event capability not justified by the skill’s stated purpose.

Content

No source excerpt is available for this finding.

Context-Inappropriate Capability

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The manifest says this skill is for Google Contacts operations and explicitly states Google Contacts is not an event source and that trigger reference files under references//triggers.md are shared platform catalogues rather than Google Contacts capabilities. This file nevertheless documents Notion event types that can forward page content and comments, which is a capability unrelated to managing Google Contacts and unjustified by the skill's stated purpose if treated as part of the skill itself.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.