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Security audit

木非舟 DRG/DIP 目录报告

Security checks for vulnerabilities and agentic risk

Overview

The skill is a narrowly scoped DRG/DIP catalogue reporting helper that clearly uses an external MedGroup MCP service and shows no hidden code, persistence, or destructive behavior.

Install this only if you intend to send DRG/DIP catalogue source files to the MedGroup service using your API key. Do not use it for patient-level, confidential, or unrelated documents unless you are authorized and comfortable with the external upload and report link workflow.

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
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (4)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The manifest description and visible skill content are written entirely in Chinese and do not indicate that the user can choose another language or locale. Under the stated policy, forcing a specific language without opt-in is a natural-language policy violation unless the locale restriction is explicitly justified.

Content

No source excerpt is available for this finding.

Vague Triggers

Medium
Category
Not specified by scanner
Confidence
96% confidence
Finding

The skill enables implicit invocation for a networked MCP tool without any visible trigger narrowing, exclusions, or user-confirmation constraints. This can cause the agent to call an external service and potentially transmit user-provided catalogue files or sensitive medical billing data unexpectedly, increasing the risk of unintended data disclosure and unsafe autonomous actions.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
94% confidence
Finding

The entire protocol is written only in Chinese and provides no indication that users may choose another language or locale. Under the stated policy, forcing a specific language without opt-in is a natural-language policy violation unless the regional constraint is explicitly justified.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
88% confidence
Finding

The display name, description, and default prompt are all written in Chinese, but the file does not indicate that the user can choose another language or that the skill is intentionally restricted to a Chinese-language audience. This may violate language/locale policy when users have not opted into that locale.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.