Security audit

Email Writer

Security checks for vulnerabilities and agentic risk

Overview

This is a simple email-writing skill with disclosed templates and guidance, and I found no executable code, hidden persistence, credential use, or data exfiltration behavior.

Before installing, expect a mostly Chinese-language template set despite the English general-purpose description. Do not grant any future version email-account, tracking, or sending permissions unless those integrations are clearly disclosed and user-controlled.

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 (1)

Natural-Language Policy Violations

Medium

Category: Not specified by scanner
Confidence: 92% confidence
Finding: This markdown file mixes an English description with examples, templates, and operational guidance that are predominantly in Chinese. Because the skill does not state that it is China/Chinese-specific or offer users a language choice, it effectively imposes a locale/language constraint without opt-in.
Content: No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.