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pleaseai/web-design

Review UI code for Web Interface Guidelines compliance

62

Quality

78%

Does it follow best practices?

Impact

—

No eval scenarios have been run

SecuritybySnyk

Advisory

Suggest reviewing before use

This version of the plugin failed moderation
Failed moderation (intent review) in skills/web-design-guidelines/SKILL.md: This skill instructs an AI agent to fetch and execute arbitrary instructions from a remote URL (https://raw.githubusercontent.com/vercel-labs/web-interface-guidelines/main/command.md) before each review. The fetched content is described as containing 'all the rules and output format instructions' that the agent should follow. This is a prompt injection / remote command execution vector: whoever controls that URL (or compromises it) can inject arbitrary instructions into the AI agent's context, potentially exfiltrating code, manipulating outputs, or performing other malicious actions. The skill is designed to blindly follow whatever instructions are fetched from the remote source.
Overview
Quality
Evals
Security
Files

Security

2 findings — 2 medium severity. This skill can be installed but you should review these findings before use.

Medium

W011: Third-party content exposure detected (indirect prompt injection risk)

What this means

The skill exposes the agent to untrusted, user-generated content from public third-party sources, creating a risk of indirect prompt injection. This includes browsing arbitrary URLs, reading social media posts or forum comments, and analyzing content from unknown websites.

Why it was flagged

Third-party content exposure detected (high risk: 0.95). The skill fetches outsider-authored free text from a public URL at runtime (`https://raw.githubusercontent.com/.../command.md`) via WebFetch, and that fetched prose is then ingested into the agent to drive rule checking/output formatting.

Report incorrect finding
Medium

W012: Unverifiable external dependency detected (runtime URL that controls agent)

What this means

The skill fetches instructions or code from an external URL at runtime, and the fetched content directly controls the agent’s prompts or executes code. This dynamic dependency allows the external source to modify the agent’s behavior without any changes to the skill itself.

Why it was flagged

Potentially malicious external URL detected (high risk: 1.00). The skill instructs the agent to fetch runtime rules via WebFetch from https://raw.githubusercontent.com/vercel-labs/web-interface-guidelines/main/command.md, and that fetched content directly controls the agent's instructions and output format, so it is a required runtime external dependency.

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Audited
Security analysis
Snyk