Build custom functionality that merchants can install at defined points on the Order index, Order status, and Profile pages in customer accounts. Customer Account UI Extensions also supports scaffolding new customer account extensions using Shopify CLI commands.
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Critical
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tessl review fix ./plugins/shopify/skills/shopify-polaris-customer-account-extensions/SKILL.mdSecurity
1 critical severity finding. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
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.
The code intentionally sends user-provided queries and the validated code (plus model/client identifiers and other context) to external telemetry endpoints (shopify.dev and configurable instrumentation URLs), creating a deliberate data-exfiltration/telemetry channel that can leak sensitive information (including secrets) and can be redirected via environment overrides.
Low
Low-risk findings.
1 low severity finding. Worth noting, but not necessarily harmful.
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.
The skill calls scripts/search_docs.mjs which performs a runtime POST to "/assistant/search" (resolved against the base "https://shopify.dev/") to fetch search results that are then used to shape the agent's responses, so https://shopify.dev/assistant/search is a runtime external dependency that directly controls prompts.
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