designing-email-templates
Author, save, and edit email templates in the PostHog workflows library — compose email design JSON with Liquid personalization and create and round-trip-edit templates over MCP. Use when asked to design, build, update, or fix an email template for workflows, broadcasts, or campaigns.
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Low
Low-risk findings worth noting
Low
Low-risk findings.
1 low severity finding. 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
SKILL.md describes a workflow where the user-authored email template design JSON (including Liquid tags and optional raw `html` blocks) is passed directly in tool calls like `workflows-create-email-template`/`workflows-update-email-template` and then rendered at runtime, meaning outsider-authored free text is ingested when creating/updating a template.
- Repository
- PostHog/posthog
- Commit
6fca5f8
- Audited
- Security analysis
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