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Security audit

universal-checkout

Security checks for vulnerabilities and agentic risk

Overview

This shopping skill clearly discloses real purchases, requires confirmation, and uses Zinc’s API for its stated purpose.

Live orders send your name, address, and phone number to Zinc for fulfillment and spend real money. Confirm the maximum purchase total, separate order fee, and payment account before buying. Searches also cost money. Keep your live API key private.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Output HandlingUnvalidated Output Injection, Cross-Context Output, Unbounded Output
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (4)

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 18)May include surrounding context.

md
Four steps, in order. Full walkthrough: [Agent Sandbox Quickstart](https://www.zinc.com/docs/v2/agent-sandbox/quickstart.md) and [Going Live](https://www.zinc.com/docs/v2/agent-sandbox/going-live.md).

1. **Get a test key.** `POST https://api.zinc.com/sandbox/keys` — no auth, no signup. Returns `api_key` (`zn_test_…`) and a ready-made `example_order`. Send it as `Authorization: Bearer <api_key>` from here on.
2. **Place a test order.** `POST /orders` with that `example_order`, then poll `GET /orders/{id}`. Free. `status` reaches **`order_placed`** — that is success, and it never becomes `delivered`; shipping shows up under `tracking_numbers[0].status`.
3. **Earn your live key.** `POST /device/code` with your test key as Bearer — that is what carries your sandbox history over. Show your operator the link it returns, then poll `POST /device/token` (no `Authorization` header; 400 `authorization_pending` means keep waiting). On approval you get a `zn_live_` key **once**, plus a **$5 start

External Transmission

Medium
Category
Data Exfiltration
Confidence
50% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 30)May include surrounding context.

Place an order

bash
curl -X POST https://api.zinc.com/orders \
  -H "Authorization: Bearer $ZINC_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{

External Transmission

Medium
Category
Data Exfiltration
Confidence
60% confidence
Finding

Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Content

Scanner excerpt · SKILL.md (reported line 30)May include surrounding context.

Place an order

bash
curl -X POST https://api.zinc.com/orders \
  -H "Authorization: Bearer $ZINC_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{

The live-order workflow sends personal shipping details to Zinc without a user-facing privacy warning.

Medium
Category
Output Handling
Confidence
88% confidence
Finding

The workflow instructs the agent to collect the operator's shipping address and phone number, then submit these along with their name to Zinc's external API. Although it clearly warns about real purchases and charges, it does not warn the operator that their personal information will be transmitted to a third-party service.

Content

No source excerpt is available for this finding.