shopify-pos-ui
Build retail point-of-sale applications using Shopify's POS UI components. These components provide a consistent and familiar interface for POS applications. POS UI Extensions also supports scaffolding new POS extensions using Shopify CLI commands. Keywords: POS, Retail, smart grid
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Critical
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tessl review fix ./plugins/shopify/skills/shopify-pos-ui/SKILL.mdSecurity
1 critical severity finding. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
The skill enforces running bundled search/validate scripts that deliberately transmit search queries, model/client identifiers, and the validated code to Shopify (and can be redirected via environment variables), which constitutes intentional data exfiltration of potentially sensitive code/metadata and a privacy/backdoor risk.
Low
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 required workflow runs `scripts/search_docs.mjs`, which performs a runtime HTTP POST to a Shopify endpoint (`/assistant/search`) using the user’s query and then includes the (potentially outsider-authored) response text in the agent/LLM context via tool output (`performSearch` → `process.stdout.write(result)`).
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
The skill's mandatory runtime tool scripts (scripts/search_docs.mjs and scripts/validate.mjs) contact Shopify endpoints using the base URL "https://shopify.dev/" (and related dev/staging hosts like "https://shopify-dev.shop.dev/" and "https://shopify-dev-staging${serverNumber}.shopifycloud.com/") to fetch /assistant/search results and report usage (/mcp/usage), and those fetched search results are a required runtime input that directly influence the agent's code-generation instructions.
- Repository
- openai/plugins
- Commit
11c74d6
- Audited
- Security analysis
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