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Security audit

KnowAir Air Quality 明气空气质量

Security checks for vulnerabilities and agentic risk

Overview

This weather skill does what it says: it runs a local Python script that sends coordinates and a Caiyun API token to Caiyun to fetch forecasts.

Install this only if you are comfortable using Caiyun Weather and sending requested coordinates to that service. Store the Caiyun token as an environment variable if possible, and avoid querying exact private locations when approximate coordinates are sufficient.

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
  • Rogue AgentSelf-Modification, Session Persistence
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
Findings (7)

Lp1

High
Category
MCP Least Privilege
Confidence
75% confidence
Finding

The skill uses 'env' capability that is not listed in its permissions. This may indicate deceptive intent or missing permission declarations.

Content

No source excerpt is available for this finding.

Lp1

High
Category
MCP Least Privilege
Confidence
75% confidence
Finding

The skill uses 'network' capability that is not listed in its permissions. This may indicate deceptive intent or missing permission declarations.

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 · scripts/query_forecast.py (reported line 11)May include surrounding context.

python
import urllib.request
import urllib.error

API_BASE = "https://api.caiyunapp.com/v2.6"

SKYCON_EN = {
    "CLEAR_DAY": "Clear", "CLEAR_NIGHT": "Clear",

Session Persistence

Medium
Category
Rogue Agent
Confidence
60% confidence
Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · scripts/query_forecast.py (reported line 185)May include surrounding context.

python
token = get_token()
    if not token:
        print(json.dumps({"error": "No API token found. Set CAIYUN_TOKEN env var or create ~/.config/knowair/token"}))
        sys.exit(2)

    if args.forecast_type == "hourly":

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
94% confidence
Finding

The example includes a Chinese-language user prompt and explicitly passes --lang zh, which indicates a forced locale/output language in the skill behavior. The file does not state that language selection is optional or user-configurable, so this can conflict with language/locale policy expectations.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
78% confidence
Finding

The CLI enforces --lang choices of only en and zh, which is a language/locale constraint expressed in natural-language-facing behavior. There is no accompanying justification that this limitation is required by a region-specific or compliance-specific use case.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
84% confidence
Finding

The skill transmits precise latitude/longitude and the API token to an external third-party service, which has privacy implications because location data can be sensitive. In this weather-skill context, the transmission is functionally necessary, so the main issue is lack of explicit disclosure/consent rather than covert exfiltration.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.