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Security audit

Hébička - Naive Comics

Security checks for vulnerabilities and agentic risk

Overview

This is a single Markdown art-prompt skill with no executable code, persistence, credential handling, or hidden high-impact behavior.

Install only if you want an art-generation prompt guide for Hébička-style comics. Expect Czech text and some inconsistent color instructions; review or edit those style defaults if you need a different language or strictly black-and-white output.

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
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • 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 (3)

Natural-Language Policy Violations

Medium
Confidence
95% confidence
Finding
The markdown repeatedly instructs generated text to be in Czech, and this line explicitly specifies handwritten Czech text as part of the output format. Because the skill does not indicate that users can choose another language or opt into Czech-only behavior, it creates a locale/language policy concern.

Natural-Language Policy Violations

Medium
Confidence
98% confidence
Finding
This instruction mandates Czech text as part of the workflow rather than presenting it as an optional stylistic choice. That is a natural-language policy violation because it forces a specific language without user opt-in.

Intent-Code Divergence

Low
Confidence
95% confidence
Finding
The skill repeatedly states as an important rule that original Hébička comics are black-and-white with no colors (L159-L164), but later prompt templates and examples instruct use of bright pastel or cheerful colors and even describe characters as green (L196-L231). This is an active contradiction within the skill documentation about the intended output style.

Static analysis

No suspicious patterns detected.