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Security audit

tftcoach

Security checks for vulnerabilities and agentic risk

Overview

This is a TFT game-coaching prompt with no executable code; its only notable behavior is using web search for current game-meta advice.

Before installing, understand that this skill will encourage your agent to search the web for current TFT patch and meta information and to analyze game screenshots you provide. It does not appear to install code or access private files by itself.

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

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · assets/banner.svg (reported line 21)May include surrounding context.

text
<rect width="1280" height="640" fill="url(#bg)"/>

  <!-- Ambient -->
  <circle cx="300" cy="320" r="250" fill="#c89b3c" opacity="0.03"/>
  <circle cx="300" cy="320" r="150" fill="#c89b3c" opacity="0.02"/>
  <circle cx="980" cy="320" r="250" fill="#0ac8b9" opacity="0.03"/>

Hidden Instructions

High
Category
Prompt Injection
Confidence
70% confidence
Finding

Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.

Content

Scanner excerpt · assets/banner.svg (reported line 52)May include surrounding context.

text
<!-- "coach" -->
  <text x="640" y="520" text-anchor="middle" font-family="system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif" font-size="100" font-weight="300" letter-spacing="4" fill="url(#blue)">coach</text>

  <!-- Tagline -->
  <text x="640" y="590" text-anchor="middle" font-family="system-ui, -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif" font-size="18" font-weight="400" fill="#ffffff" opacity="0.3" letter-spacing="4">YOUR BOARD. YOUR ITEMS. THE PLAY.</text>

  <!-- Corner brackets -->

Static analysis

No suspicious patterns detected.