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Security audit

Fanatics Merchandise API - Jersey Prices, Sales, Sizes, League Shops

Security checks for vulnerabilities and agentic risk

Overview

ClawScan judged this skill benign with medium confidence: the reported external API requests fit its merchandise API purpose, though one scanner flagged them and inspection was partial.

The verdict is benign, not risk-free. The scan found one Markdown file and completed AIG scanning without findings, but Skillspector reported partial analysis because three local references could not be resolved. Consider whether you trust the external API service and are comfortable using an API key with it; the scan does not fully resolve all referenced content.

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
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (8)

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 185)May include surrounding context.

Search

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

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 185)May include surrounding context.

Search

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

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 324)May include surrounding context.

Search on a European storefront

bash
curl -X POST https://api.scavio.dev/api/v1/fanatics/search \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "camiseta real madrid", "country": "es"}'

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 406)May include surrounding context.

Product

bash
curl -X POST https://api.scavio.dev/api/v1/fanatics/product \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"product_id": "3892922"}'

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 523)May include surrounding context.

Browse a team's hats

bash
curl -X POST https://api.scavio.dev/api/v1/fanatics/browse \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"league_id": 23, "team_id": 3372, "department_id": 8008}'

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 562)May include surrounding context.

Deals

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

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 594)May include surrounding context.

Reviews

bash
curl -X POST https://api.scavio.dev/api/v1/fanatics/reviews \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  --max-time 300 \

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 698)May include surrounding context.

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

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