webspec-index
Use webspec-index to query WHATWG, W3C, IETF and TC39 web specifications from the command line
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Low
Low-risk findings worth noting
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tessl review fix ./.agents/skills/webspec-index/SKILL.mdLow
Low-risk findings.
2 low severity findings. Worth noting, but not necessarily harmful.
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
The skill runtime path allows outsider-provided free text to be used as the query input for `webspec-index query`/`search` (including URL queries for allowlisted domains and PR preview queries), which then causes the tool to fetch and ingest spec section content into its output.
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
webspec-index fetches specification HTML and PR previews at runtime (e.g., https://html.spec.whatwg.org/#navigate and whatpr.org) and uses that fetched content to produce query results, so remote content directly controls the agent's outputs.
- Repository
- mozilla/enterprise-firefox
- Commit
cd7d47c
- Audited
- Security analysis
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