Security Audit
youtube-downloader
github.com/ComposioHQ/awesome-claude-skillsTrust Assessment
youtube-downloader received a trust score of 10/100, placing it in the Untrusted category. This skill has significant security findings that require attention before use in production.
SkillShield's automated analysis identified 10 findings: 4 critical, 5 high, 0 medium, and 0 low severity. Key findings include Arbitrary command execution, Dangerous call: subprocess.run(), User-controlled output path allows arbitrary file writes.
The analysis covered 4 layers: Manifest Analysis, Static Code Analysis, Dependency Graph, LLM Behavioral Safety. The Manifest Analysis layer scored lowest at 0/100, indicating areas for improvement.
Last analyzed on February 20, 2026 (commit 27904475). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.
Layer Breakdown
Behavioral Risk Signals
Security Findings10
| Severity | Finding | Layer | Location | |
|---|---|---|---|---|
| CRITICAL | Arbitrary command execution Python shell execution (os.system, subprocess) Review all shell execution calls. Ensure commands are static (not built from user input), use absolute paths, and are strictly necessary. Prefer library APIs over shell commands. | Manifest | video-downloader/scripts/download_video.py:16 | |
| CRITICAL | Arbitrary command execution Python shell execution (os.system, subprocess) Review all shell execution calls. Ensure commands are static (not built from user input), use absolute paths, and are strictly necessary. Prefer library APIs over shell commands. | Manifest | video-downloader/scripts/download_video.py:19 | |
| CRITICAL | Arbitrary command execution Python shell execution (os.system, subprocess) Review all shell execution calls. Ensure commands are static (not built from user input), use absolute paths, and are strictly necessary. Prefer library APIs over shell commands. | Manifest | video-downloader/scripts/download_video.py:24 | |
| CRITICAL | Arbitrary command execution Python shell execution (os.system, subprocess) Review all shell execution calls. Ensure commands are static (not built from user input), use absolute paths, and are strictly necessary. Prefer library APIs over shell commands. | Manifest | video-downloader/scripts/download_video.py:92 | |
| HIGH | Dangerous call: subprocess.run() Call to 'subprocess.run()' detected in function 'get_video_info'. This can execute arbitrary code. Avoid using dangerous functions like exec/eval/os.system. Use safer alternatives. | Static | video-downloader/scripts/download_video.py:24 | |
| HIGH | Dangerous call: subprocess.run() Call to 'subprocess.run()' detected in function 'check_yt_dlp'. This can execute arbitrary code. Avoid using dangerous functions like exec/eval/os.system. Use safer alternatives. | Static | video-downloader/scripts/download_video.py:16 | |
| HIGH | Dangerous call: subprocess.run() Call to 'subprocess.run()' detected in function 'download_video'. This can execute arbitrary code. Avoid using dangerous functions like exec/eval/os.system. Use safer alternatives. | Static | video-downloader/scripts/download_video.py:92 | |
| HIGH | Dangerous call: subprocess.run() Call to 'subprocess.run()' detected in function 'check_yt_dlp'. This can execute arbitrary code. Avoid using dangerous functions like exec/eval/os.system. Use safer alternatives. | Static | video-downloader/scripts/download_video.py:19 | |
| HIGH | User-controlled output path allows arbitrary file writes The `download_video` function allows the user to specify an arbitrary `output_path` via the `--output` command-line argument. While the default is a sandboxed directory (`/mnt/user-data/outputs`), a malicious user could provide a path like `/etc/passwd` or `/root/.ssh/authorized_keys` (if the agent has sufficient permissions) to overwrite or create files in sensitive system locations. This constitutes a path traversal vulnerability and excessive file system write permissions, potentially leading to system compromise or data corruption. Restrict the `output_path` to a predefined, sandboxed directory (e.g., `/mnt/user-data/outputs/`) and disallow user-specified paths outside this sandbox. If user-specified paths are necessary, implement strict path sanitization and validation to prevent directory traversal (e.g., disallow `..` or absolute paths outside the sandbox) and ensure the agent's permissions are limited to only necessary directories. | LLM | scripts/download_video.py:128 | |
| INFO | Unpinned `yt-dlp` dependency in installation The `check_yt_dlp` function installs `yt-dlp` using `pip install yt-dlp` without specifying a version. This means that future installations could pull a newer, potentially incompatible, or even compromised version of `yt-dlp`. While `yt-dlp` is a reputable project, relying on the latest available version without pinning introduces a supply chain risk, as a malicious update to the package could introduce vulnerabilities. Pin the `yt-dlp` dependency to a specific, known-good version (e.g., `yt-dlp==2023.11.16`) to ensure consistent and secure installations. Regularly review and update the pinned version to benefit from security patches while maintaining control over the installed dependency. | LLM | scripts/download_video.py:16 |
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