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Security audit

Weather Check

Security checks for vulnerabilities and agentic risk

Overview

This weather skill is a simple documented wrapper for a remote weather API, with expected location sharing and no local persistence or hidden execution.

Before installing, understand that weather queries, including precise coordinates if you provide them, are sent to weather.agentutil.net. Use city or region names instead of exact coordinates when you do not need precision.

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 (2)

Missing User Warnings

Medium
Confidence
92% confidence
Finding
The skill documentation instructs users to send location names or precise coordinates to a third-party weather service without clearly warning that this data leaves the local environment. Location data can be sensitive, especially when exact coordinates are used, so the omission creates a real privacy and transparency issue even if the service claims limited data collection.

External Transmission

Medium
Category
Data Exfiltration
Content
### Current Weather

```bash
curl -X POST https://weather.agentutil.net/v1/current \
  -H "Content-Type: application/json" \
  -d '{"location": "London"}'
```
Confidence
88% confidence
Finding
The skill performs an outbound POST request to an external service and includes user-supplied location information in the request body. External transmission is expected for a weather skill, but it still represents a genuine data exposure risk because sensitive location inputs are sent to a remote operator outside the user's direct control.

Static analysis

No suspicious patterns detected.