Security audit

work-review-timemachine for feishu

Security checks for vulnerabilities and agentic risk

Overview

This skill is a focused Feishu work-summary helper with disclosed document reading and optional user-requested document writing.

Install this only if you are comfortable letting the agent read relevant Feishu work documents and meeting materials to summarize your work. When asking it to create or refine a Feishu document, specify the target document and review the draft before allowing overwrites of content you care about.

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

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
Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep

Findings (2)

Missing User Warnings

Medium

Confidence: 93% confidence
Finding: The skill explicitly permits creating a new Feishu document and even overwriting an existing draft, but it does not require a clear confirmation step immediately before the write action. In an agent setting, this can cause unintended modification of user data or corruption of an existing document if the agent misinterprets the user's request or applies an overly aggressive refinement.

Natural-Language Policy Violations

Medium

Confidence: 95% confidence
Finding: The instruction mandates writing in concise Chinese unless the user asks otherwise, which establishes a default language preference without prior user opt-in. This can violate language/locale policy expectations when the user has not requested Chinese output.

Static analysis

No suspicious patterns detected.