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Security audit

Ulta Beauty API - Search, Prices, Shades, Store Stock

Security checks for vulnerabilities and agentic risk

Overview

The skill provides clearly described Ulta product and store-stock lookups through Scavio, with proportionate data sharing and no harmful behavior found.

Scavio receives your searches and, for nearby inventory, the ZIP and product you choose. Protect your API key and account for per-request credits. Direct API calls avoid the broader optional MCP tool set. Remote service behavior and optional package internals were not verified; the provider documentation pages were unavailable during review.

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 store-lookup workflow sends the user's ZIP code to Scavio without a user-facing privacy warning.

Medium
Category
Output Handling
Confidence
92% confidence
Finding

L074 instructs the agent to submit the user's ZIP code and selected product identifiers to the Scavio API, disclosing location-related data and product interest to a third party. Although the file identifies Scavio as the API provider, it does not instruct the agent to warn the user about this disclosure before performing the lookup.

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 110)May include surrounding context.

Examples

bash
curl -X POST https://api.scavio.dev/api/v1/ulta/stores \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"product_id": "pimprod2057119", "sku_id": "2648428", "zip": "10001"}'

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 110)May include surrounding context.

Examples

bash
curl -X POST https://api.scavio.dev/api/v1/ulta/stores \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"product_id": "pimprod2057119", "sku_id": "2648428", "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 226)May include surrounding context.

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

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