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Security audit

kids-english-teacher

Security checks for vulnerabilities and agentic risk

Overview

This skill is a coherent child-English-homework helper that creates an interactive HTML lesson, with microphone and file-output behavior that should be understood before use.

Install only if you expect it to analyze children’s English homework images and create downloadable HTML lesson files. Review the generated page before a child uses it, and be aware that speech practice may ask Chrome for microphone permission and may rely on the browser’s speech-recognition behavior.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • 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)

Vague Triggers

High
Category
Not specified by scanner
Confidence
95% confidence
Finding

The skill description contains broad trigger phrases like '幫我做一個學習頁' combined with any attached image, which can cause the agent to invoke this skill for loosely related requests outside its intended scope. Over-broad activation increases the chance of unintended image analysis, HTML generation, and file creation when the user did not clearly request those actions.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
91% confidence
Finding

The skill prominently includes microphone-based speech recognition and instructs users to allow mic access, but the description lacks an upfront privacy notice about audio capture and browser speech-recognition handling. For a child-focused skill, this omission is more sensitive because parents may not expect mic use or understand whether audio is processed locally or by the browser/platform.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
85% confidence
Finding

The skill instructs the agent to save a generated HTML file to disk and return it, but the skill description does not clearly warn users up front that a file will be created. This can lead to unexpected persistence of user-derived content and surprise file generation, especially when triggered automatically from an uploaded image.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.