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Security audit

Google Chat

Security checks for vulnerabilities and agentic risk

Overview

This Google Chat skill is mostly coherent, but its first-time setup tells the agent to install a CLI by running an unaudited remote script in the shell.

Review the OOMOL CLI installation path before allowing the setup command to run, especially on machines with sensitive data. After setup, confirm message recipients and payloads carefully before allowing the skill to send Google Chat messages.

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 via a remote script piped directly into a shell (curl ... | bash), which is a classic arbitrary code execution pattern. Because skill content is adversarial by default and this appears in operational instructions, a compromised host, CDN, DNS path, or upstream script could execute attacker-controlled code on the system.

Content

Scanner excerpt · SKILL.md (reported line 62)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 Google Chat request" and whenever a task involves Google Chat. That activation scope is very broad and lacks limiting conditions or negative examples, which could cause unintended invocation for casual mentions or loosely related tasks.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.