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Security audit

Caption track preflight

Security checks for vulnerabilities and agentic risk

Overview

This skill is a bounded caption-file preflight workflow that uses a disclosed PowMCP checker, with install and data-sharing caveats users should understand.

Before installing, confirm you trust PowMCP and the skill source, preferably use a pinned or reviewed revision if available, and remember that caption files or public URLs submitted to the MCP service may be processed remotely. Do not provide credentialed or private URLs unless you intend to share that caption content with the service.

A.I.G

Vulnerability Patterns
  • Insecure DependenciesIntroduces malicious components through unsafe dependency sources
  • 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
Findings (1)

T08 · Insecure Dependencies

Warning
Location
SKILL.md:40
Finding

Unpinned Third-Party Installer and Skill Source

Content
View full analysis
Remediation
View remediation

SkillSpector

Vulnerability Patterns
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (2)

Rp1

Medium
Category
MCP Rug Pull
Confidence
89% confidence
Finding

The skill instructs users to install and run an MCP-related package via npx skills add powmcp/skills without any version pinning or integrity control. That creates a supply-chain risk: a future compromised, typosquatted, or maliciously updated package/version could be executed in the user's environment when they follow the skill.

Content

No source excerpt is available for this finding.

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
80% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 81)May include surrounding context.

md
Use the actual WebVTT, SRT, or TTML/IMSC file intended for handoff, not a draft or reconstruction.

Provide one attached file or one public HTTP(S) URL. Do not provide both. Do not ask the user to host an attached file publicly.

Record the attachment identity or public URL. Do not repeat a URL query string in narration.