ClawHub
Back to skill

Security audit

快递物流查询 - Express Logistics Track

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward courier-tracking integration that sends user-provided shipment details to JisuAPI for its stated purpose.

Install this only if you are comfortable sharing shipment tracking numbers, courier type, your JisuAPI key, and sometimes the last four phone digits with JisuAPI. Avoid using it for sensitive shipments unless that third-party data sharing is acceptable.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • MCP Tool PoisoningHidden Instructions, Unicode Deception, Parameter Description Injection
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
Findings (9)

Tp2

High
Category
MCP Tool Poisoning
Confidence
85% confidence
Finding

Mixing characters from multiple Unicode scripts in a single identifier is a common technique to create visually ambiguous tool names.

Content

No source excerpt is available for this finding.

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
94% confidence
Finding

The skill requires environment access and makes network-backed API calls, but the manifest does not declare an explicit tool scope such as permissions or allowed-tools. This creates a governance gap: hosts or reviewers may not clearly understand that the skill can transmit user-supplied tracking numbers and related data to an external service.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The trigger description includes broad everyday phrasing such as asking where a package is, which can cause accidental invocation. Mis-triggering matters here because the skill sends tracking numbers and possibly phone suffixes to a third-party API, creating unnecessary disclosure and user-confusion risk.

Content

No source excerpt is available for this finding.

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The documentation does not clearly warn that the tracking number and, for some carriers, the last four digits of a phone number will be transmitted to JisuAPI. This is a privacy and consent issue because users may not expect shipment identifiers and phone-derived data to leave the local agent environment.

Content

No source excerpt is available for this finding.

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 95)May include surrounding context.

md
"number": "4303200322000",
  "type": "yunda",
  "typename": "韵达快运",
  "logo": "https://api.jisuapi.com/express/static/images/logo/80/yunda.png",
  "list": [
    {
      "time": "2019-12-30 20:24:51",

External Transmission

Medium
Category
Data Exfiltration
Confidence
87% confidence
Finding

The code is explicitly designed to send user-provided tracking information to an external service at api.jisuapi.com. External transmission is not inherently malicious in this context, but it is security-relevant because shipment numbers and optional mobile data leave the local trust boundary and are exposed to a third party.

Content

Scanner excerpt · express.py (reported line 13)May include surrounding context.

python
import requests


API_URL = "https://api.jisuapi.com/express/query"
TYPE_URL = "https://api.jisuapi.com/express/type"

External Transmission

Medium
Category
Data Exfiltration
Confidence
83% confidence
Finding

This endpoint fetches the supported courier company list from a third-party API. While less sensitive than shipment queries, it still creates an external dependency and trust-boundary crossing that may expose usage metadata and availability to a remote service.

Content

Scanner excerpt · express.py (reported line 14)May include surrounding context.

python
API_URL = "https://api.jisuapi.com/express/query"
TYPE_URL = "https://api.jisuapi.com/express/type"


def query_express(appkey: str, req: dict):

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The skill transmits shipment metadata supplied by the user, including tracking number and optionally mobile digits, to a third-party API endpoint. Even though this is necessary for the feature, the code provides no in-skill consent prompt, warning, or minimization controls at the point of transmission, which creates a privacy and data-sharing risk.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
92% confidence
Finding

The code's human-facing documentation and usage examples are written in Chinese, and the script presents Chinese-only examples such as required JSON fields and command usage context. There is no indication that users may choose another language or that the locale restriction is intentional and documented as region-specific.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.