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Security audit

effective-print-design

Security checks for vulnerabilities and agentic risk

Overview

This skill is documentation-only guidance for print-focused HTML/CSS and does not show hidden code execution, data access, persistence, or privilege escalation.

Reasonable to install if you want print CSS and typography help. For better supply-chain hygiene, prefer a pinned installer version or a trusted installation path, and be aware the skill may activate for broad requests about documents intended for paper.

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 (3)

Rp1

Medium
Category
MCP Rug Pull
Confidence
94% confidence
Finding
The README instructs users to run `npx skill.sh install ...` without pinning a specific version of the package. Because `npx` resolves and executes the latest published package by default, a compromised maintainer account, dependency-chain attack, or malicious new release could cause arbitrary code execution on the user's machine at install time.

Vague Triggers

Medium
Confidence
95% confidence
Finding
The skill advertises automatic activation on broad phrases such as mentions of print stylesheets or documents that should look good on paper. Overly broad triggers can cause the skill to activate in unintended contexts, injecting additional instructions or influencing model behavior when the user did not explicitly request this skill, which increases prompt-surface risk and may interfere with safer or more relevant skills.

Natural-Language Policy Violations

Medium
Confidence
93% confidence
Finding
The file explicitly scopes its guidance to "Western languages," which is a natural-language locale constraint. Under the policy, locale restrictions should either be optional for the user or clearly justified as region-specific; this line provides neither user opt-in nor a compliance-oriented justification.

Static analysis

No suspicious patterns detected.