web-fetch
Fetches web content with intelligent content extraction, converting HTML to clean markdown. Use for documentation, articles, and reference pages http/https URLs.
83
Quality
83%
Does it follow best practices?
Impact
74%
24.66xAverage score across 3 eval scenarios
Advisory
Suggest reviewing before use
Security
2 findings — 2 medium severity. This skill can be installed but you should review these findings before use.
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: 0.90). SKILL.md explicitly instructs the agent to fetch arbitrary http/https URLs (e.g., "curl -s "<url>" | html2markdown..." and the universal fallback "bun ~/.claude/skills/web-fetch/fetch.ts "<url>""), so it ingests untrusted public web content that could contain user-generated instructions able to influence subsequent tool use or decisions.
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: 0.90). The skill explicitly runs curl on arbitrary http/https targets at runtime (e.g., `curl -s "<url>" | html2markdown`) to fetch and inject remote page content into the agent context, so a fetched URL can directly control prompts or instructions.
- Repository
- NeverSight/skills_feed
- Commit
5342bca
- Audited
- Security analysis
Is this your skill?
If you maintain this skill, you can claim it as your own. Once claimed, you can manage eval scenarios, bundle related skills, attach documentation or rules, and ensure cross-agent compatibility.