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Security audit

飞书媒体发送

Security checks for vulnerabilities and agentic risk

Overview

This skill provides straightforward instructions for sending user-chosen media files through Feishu, with no hidden code, persistence, or unrelated access.

Before using this skill, verify the destination chat or user and the exact local file path or URL being sent, especially for private or business-sensitive files. The skill itself does not add hidden behavior, but any Feishu media-sending workflow can expose files externally if the wrong target or path is chosen.

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
  • 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 (1)

Vague Triggers

Medium
Confidence
92% confidence
Finding
The activation description is broad enough to trigger on very common requests involving sending any kind of media file in Feishu, which can cause the skill to activate in contexts where more specific user intent or safer workflow checks are needed. In a messaging/file-transfer skill, overbroad activation increases the chance of unintended file exfiltration, accidental delivery to the wrong recipient, or invocation without sufficient confirmation of target and content.

Static analysis

No suspicious patterns detected.