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Security audit

Willhaben Search

Security checks for vulnerabilities and agentic risk

Overview

This skill is a simple documented marketplace-search helper that calls a public API and does not install code, request credentials, or persist anything.

Before installing, understand that searches you ask the agent to run may be sent to api.nochda.at and results may link out to willhaben.at. Avoid putting sensitive personal information into search queries, but the skill itself does not show hidden behavior or elevated access.

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
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

External Transmission

Medium
Category
Data Exfiltration
Content
No authentication required. All endpoints return JSON.

```bash
curl "https://api.nochda.at/api/health"
```

Rate limits: 50 req/min global, 10 req/min for search/suggest.
Confidence
50% confidence
Finding
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Static analysis

No suspicious patterns detected.