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Security audit

Google Tasks

Security checks for vulnerabilities and agentic risk

Overview

The skill is mostly coherent for managing Google Tasks, but its setup instructions include unverified remote installer commands that can execute arbitrary code on a user's machine.

Review the installer path before installing. Prefer installing the oo CLI from official, versioned documentation with integrity verification if available, and only allow write or destructive Google Tasks actions after checking the exact task list, task, payload, and effect.

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 users to install software by piping a remotely fetched script directly into a shell (curl ... | bash), which executes unverified code from the network without integrity checking or human review. If the install endpoint, transport, or upstream distribution is compromised, this can lead to arbitrary code execution on the user's machine.

Content

Scanner excerpt · SKILL.md (reported line 70)May include surrounding context.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
93% confidence
Finding

The description says to use this skill for "ANY Google Tasks request" and "Whenever a task involves Google Tasks, use this skill," which is extremely broad and lacks boundaries or exclusion cases. There are no negative examples or scope constraints to clarify when another tool or direct user guidance would be more appropriate.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.