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Security audit

Video Add Captions

Security checks across malware telemetry and agentic risk

Overview

The skill is a disclosed local video-captioning workflow with no evidence of hidden data access or exfiltration, though the package appears to be missing some referenced runtime assets.

Before installing, confirm you are comfortable with a local media workflow that runs ffmpeg, Node scripts, npx hyperframes, and opens local review HTML. Also verify the package includes the referenced font and preview image assets, because this artifact may not run as packaged.

SkillSpector

By NVIDIA
Vulnerability Patterns
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • 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 (1)

Lp3

Medium
Category
MCP Least Privilege
Confidence
89% confidence
Finding
The skill directs the agent to read and write numerous project files and execute shell commands (Python, Node, PowerShell, ffmpeg, npx), but it does not declare permissions for those capabilities. This creates a trust and enforcement gap: a host may present the skill as low-privilege while it actually requires broad filesystem and command execution access, increasing the chance of unintended execution of risky operations.

VirusTotal

61/61 vendors flagged this skill as clean.

View on VirusTotal

Static analysis

Detected: suspicious.dangerous_exec, suspicious.dynamic_code_execution

Shell command execution detected (child_process).

Critical
Code
suspicious.dangerous_exec
Location
scripts/check_caption_interaction.mjs:64

Dynamic code execution detected.

Critical
Code
suspicious.dynamic_code_execution
Location
scripts/check_caption_review.py:34