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Security audit

Wayfair API - Product Prices, Sale and Was Price, Reviews, Delivery

Security checks for vulnerabilities and agentic risk

Overview

The scanners classify this skill as benign because its reported calls to Scavio fit its API purpose, while noting that postal codes may be shared without a privacy disclosure and the scan was partial.

The verdict is benign, not risk-free. Before installing, consider whether you are comfortable with delivery-estimate requests sharing a ZIP or postal code with Scavio. The scan was partial because some referenced paths could not be resolved, so the evidence is incomplete.

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
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 (7)

The delivery-estimate workflow sends the user's ZIP or postal code to Scavio without a privacy disclosure.

Medium
Category
Output Handling
Confidence
94% confidence
Finding

The workflow instructs the agent to submit a ZIP or Canadian postal code to the product endpoint hosted by Scavio, a third-party service. Although the API host and request parameters are documented, the skill does not warn users that their location data will be shared with Scavio to obtain the estimate.

Content

No source excerpt is available for this finding.

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 178)May include surrounding context.

Search

bash
curl -X POST https://api.scavio.dev/api/v1/wayfair/search \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "office chair"}'

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 178)May include surrounding context.

Search

bash
curl -X POST https://api.scavio.dev/api/v1/wayfair/search \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "office chair"}'

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 371)May include surrounding context.

Category

bash
curl -X POST https://api.scavio.dev/api/v1/wayfair/category \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"category_id": "413892", "sort": "price_asc"}'

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 445)May include surrounding context.

Sale events

bash
curl -X POST https://api.scavio.dev/api/v1/wayfair/deals \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'

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 258)May include surrounding context.

Product

bash
curl -X POST https://api.scavio.dev/api/v1/wayfair/product \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"sku": "W005006988", "zip": "10001"}'

External Transmission

Medium
Category
Data Exfiltration
Confidence
70% 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 503)May include surrounding context.

md
HEADERS = {"Authorization": f"Bearer {API_KEY}"}

def wayfair(endpoint, body, timeout=180):
    r = requests.post(f"{BASE}/api/v1/wayfair/{endpoint}", headers=HEADERS, json=body, timeout=timeout)
    r.raise_for_status()
    return r.json()["data"]