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Security audit

微信公众号自定义主题生成器

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward WeChat theme CSS generator with disclosed local file output and no executable or hidden behavior.

Before installing, expect the skill to generate and save a local CSS theme file. Choose the output filename deliberately and avoid overwriting an existing theme unless that is intended.

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
  • 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)

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
72% confidence
Finding

The skill content presents its operational instructions entirely in Chinese and uses mandatory language for agent behavior, but it does not state that the skill is intentionally restricted to Chinese users or offer an opt-in language choice. Under the language/locale policy, forcing a specific language without user opt-in can be a policy concern.

Content

No source excerpt is available for this finding.

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
93% confidence
Finding

The skill explicitly instructs the agent to write generated CSS to a local file in the current directory, but it does not require user confirmation, safe default naming, or overwrite protection. In an automated agent context, silent file creation or replacement can cause unintended modification of workspace files or clobber an existing theme file, especially if downstream tools assume the file is trusted.

Content

No source excerpt is available for this finding.