acul-screen-generator
Use when building or customizing Auth0 Universal Login screens with full UI control — creating branded login, signup, or MFA screens using the ACUL React or Vanilla JS SDK. Use this even if the user says "custom login page", "style my Auth0 login", or "build my own Universal Login UI" without mentioning ACUL directly. Does not cover basic branding (colors/logo only) — use auth0-branding for that.
73
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Does it follow best practices?
Impact
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No eval scenarios have been run
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: 0.85). The required runtime workflow can fetch outsider-authored free text from public GitHub pages (SDK examples and/or auth0-acul-samples references) in Phase 2B Step 4b and Phase 2B Step 2/4, and that fetched prose/code is then ingested into the agent’s LLM context to generate screen files.
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 instructs fetching GitHub references at runtime (e.g., https://github.com/auth0-samples/auth0-acul-samples/tree/main/react/src/screens/<screen-name> and https://github.com/auth0/universal-login/blob/master/packages/auth0-acul-react/examples/<screen-name>.md) to drive code generation and determine SDK hooks/action names, so remote content from those URLs is fetched during runtime and directly controls the agent's generated prompts/instructions.
- Repository
- auth0/agent-skills
- Commit
aacefa7
- Audited
- Security analysis
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