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Security audit

Sam's Club Product Data API - Club Prices, Instant Savings, Stock, Reviews

Security checks for vulnerabilities and agentic risk

Overview

The verdict is benign with medium confidence: the scanners report a skill that sends product queries to Scavio, with a privacy disclosure concern, and no AIG findings; coverage is incomplete.

Before installing, consider that using the skill may send ZIP codes and product searches to Scavio, and the scan flagged a lack of user-facing disclosure. The verdict is benign, but confidence is medium and coverage is incomplete: Skillspector inspected only part of the single Markdown file, with a malformed manifest and unresolved local references.

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)

The workflow sends the user's ZIP code and search terms to Scavio without a user-facing privacy disclosure.

Medium
Category
Output Handling
Confidence
90% confidence
Finding

These steps instruct the agent to submit the user's ZIP code and product query to a third-party API. Although the file identifies Scavio as the API provider, it does not instruct the agent to notify the user that their location information and search terms will be shared with that service.

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 133)May include surrounding context.

Examples

bash
curl -X POST https://api.scavio.dev/api/v1/samsclub/product \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"item_id": "15325822107", "club_id": "6372"}'

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 133)May include surrounding context.

Examples

bash
curl -X POST https://api.scavio.dev/api/v1/samsclub/product \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"item_id": "15325822107", "club_id": "6372"}'

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 226)May include surrounding context.

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

def sams(endpoint, body):
    r = requests.post(f"{BASE}/api/v1/samsclub/{endpoint}", headers=HEADERS, json=body, timeout=120)
    r.raise_for_status()
    return r.json()["data"]