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Security audit

Douyin Cover Builder(抖音封面生成器)

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed prompt-building guide for Douyin cover images and does not show hidden execution, persistence, credential access, or destructive behavior.

Before installing, consider that the workflow is mainly documented in Chinese and may encourage uploading a portrait to an image model; only use photos you are comfortable providing to the chosen image-generation service.

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 (5)

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The description states the skill is for Chinese creators and the rest of the instructions are written entirely in Chinese, which effectively constrains use to a specific language/locale. There is no opt-in, alternative language option, or explicit justification that this is a region-specific compliance or localization requirement.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Medium
Category
Not specified by scanner
Confidence
88% confidence
Finding

The heading is written entirely in Chinese and frames the guidance as the required implementation approach, with no indication that users may choose another language or locale. This can violate language/locale policy when a skill implicitly forces a specific language without user opt-in.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
90% confidence
Finding

This file’s natural-language content is fully Chinese, including the title and all update notes, with no indication that users may choose another language. Under the policy rule, forcing a specific language without opt-in can be a natural-language policy concern unless the locale restriction is explicitly justified.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
91% confidence
Finding

The README states that the skill is 'for Chinese creators' in both Chinese and English, which presents a locale-targeting constraint in natural language. Because the file does not clarify that this is an optional audience focus or provide an explicit language/locale choice, it can be interpreted as a policy-relevant locale restriction.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
90% confidence
Finding

The usage instructions, examples, and operational guidance are presented only in Chinese, which can amount to a language/locale policy issue when no user opt-in or alternative language is offered. The documented behavior does not indicate that the skill is region-specific or that users can choose another language.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.