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Security audit

youtube-stable-downloader

Security checks for vulnerabilities and agentic risk

Overview

This skill is a straightforward online video download helper, with legal and privacy considerations but no evidence of hidden or unsafe agent behavior.

Install only if you are comfortable sending video URLs to the service and receiving files via a cloud download link. Use it only for videos you own, have permission to save, or are otherwise allowed to download under applicable law and platform terms.

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)

Missing User Warnings

Medium
Category
Not specified by scanner
Confidence
92% confidence
Finding

The skill explicitly enables downloading online videos for offline use but provides no warning about copyright, platform terms-of-service, or content-ownership restrictions. This can facilitate unauthorized copying or redistribution by users who may assume the behavior is broadly permitted, creating legal and policy risk even though it is not a software exploit in the traditional sense.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
86% confidence
Finding

The file includes a full Chinese-language section with example invocation phrases, but it does not clarify that language choice is optional or user-selected. Under the stated policy, forcing or presuming a specific language without opt-in can be a natural-language policy violation.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.