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Security audit

Carrefour API - Grocery Prices by Store, Promotions, Nutri-Score, Stores

Security checks for vulnerabilities and agentic risk

Overview

The skill is rated benign with medium confidence: scanners found no issues in one scan, while another flagged external API requests and missing location privacy notice; findings were considered purpose-related, but coverage was partial.

Before installing, consider that using store lookup may send your postal code to Scavio without a privacy notice. The results are incomplete: Skillspector marked its analysis partial because some local references were missing, and the findings do not establish whether the external service is trustworthy.

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 (13)

The store-price workflow sends the shopper's postal code to Scavio without a privacy warning.

Medium
Category
Output Handling
Confidence
91% confidence
Finding

The workflow instructs the agent to call the store locator with the shopper's postal code, and the configured API host is the third-party service api.scavio.dev. Although the provider and request parameters are documented, the skill does not warn users that their location information will be transmitted to Scavio.

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 195)May include surrounding context.

Search

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

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 195)May include surrounding context.

Search

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

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 422)May include surrounding context.

Product

bash
curl -X POST https://api.scavio.dev/api/v1/carrefour/product \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ean": "3017620422003"}'

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 514)May include surrounding context.

Reviews

bash
curl -X POST https://api.scavio.dev/api/v1/carrefour/reviews \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ean": "8006530256179"}'

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 563)May include surrounding context.

Category and promotions

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

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 768)May include surrounding context.

Store and fuel prices

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

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 841)May include surrounding context.

Argentina, Romania and Belgium

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

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 368)May include surrounding context.

Search at one store

bash
curl -X POST https://api.scavio.dev/api/v1/carrefour/search \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "nutella", "store": "840093"}'

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 598)May include surrounding context.

Suggestions

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

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 628)May include surrounding context.

Stores

bash
curl -X POST https://api.scavio.dev/api/v1/carrefour/stores \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"postal_code": "69003"}'

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 707)May include surrounding context.

Store availability

bash
curl -X POST https://api.scavio.dev/api/v1/carrefour/store-availability \
  -H "Authorization: Bearer $SCAVIO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ean": "3017620422003", "postal_code": "69003"}'

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 884)May include surrounding context.

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

def carrefour(endpoint, body, timeout=60):
    r = requests.post(f"{BASE}/api/v1/carrefour/{endpoint}", headers=HEADERS, json=body, timeout=timeout)
    r.raise_for_status()
    return r.json()["data"]