Trust Assessment
skill-compatibility-checker 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 12 findings: 6 critical, 2 high, 3 medium, and 1 low severity. Key findings include Unsafe environment variable passthrough, Arbitrary command execution, Credential harvesting.
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 14, 2026 (commit 13146e6a). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.
Layer Breakdown
Behavioral Risk Signals
Security Findings12
| Severity | Finding | Layer | Location | |
|---|---|---|---|---|
| CRITICAL | Arbitrary command execution Node.js child_process require 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 | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:16 | |
| CRITICAL | Arbitrary command execution Node.js synchronous shell execution 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 | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:117 | |
| CRITICAL | Arbitrary command execution Node.js synchronous shell execution 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 | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:119 | |
| CRITICAL | Arbitrary command execution Node.js synchronous shell execution 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 | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:471 | |
| CRITICAL | Credential harvesting Bulk environment variable dump Skills should only access environment variables they explicitly need. Bulk environment dumps (os.environ.copy, JSON.stringify(process.env)) are almost always malicious. Remove access to Keychain, GPG keys, and credential stores. | Manifest | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:176 | |
| CRITICAL | Command Injection via skillPath in security scan The `runSecurityScan` function directly interpolates the `skillPath` variable, which is derived from user input (command-line argument), into a shell command executed via `execSync`. A malicious user could craft `skillPath` to include shell metacharacters (e.g., `my_skill"; rm -rf / #`) leading to arbitrary command execution on the host system when the security scan is initiated. Avoid direct interpolation of user-controlled input into shell commands. Use `spawnSync` or `execa` with arguments passed as an array to prevent shell injection. For example, `spawnSync('skill-security-scanner', [skillPath], { encoding: 'utf8' });` | LLM | scripts/checker.js:340 | |
| HIGH | Unsafe environment variable passthrough Bulk environment variable harvesting Minimize environment variable exposure. Only pass required, non-sensitive variables to MCP servers. Use dedicated secret management instead of environment passthrough. | Manifest | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:176 | |
| HIGH | Command Injection via CLI tool name checks The `commandExists` function, used to verify the presence of CLI tools, directly interpolates the `cmd` argument into a shell command (`which ${cmd}` or `where ${cmd}`). If `cmd` is derived from untrusted skill metadata (e.g., `SKILL.md` content or `package.json` `bin` field), a malicious skill could specify a tool name like `ffmpeg; malicious_command` to achieve command injection. Similarly, `checkConflicts` uses `execSync` with `binCommand` from `package.json` for CLI command conflict detection, which is also untrusted input. Sanitize or validate `cmd` to ensure it contains only safe characters before passing it to `execSync`. Alternatively, use `spawnSync` with the command and arguments as separate array elements (e.g., `spawnSync('which', [cmd])`) to prevent shell interpretation of `cmd`. | LLM | scripts/checker.js:109 | |
| MEDIUM | Unsafe deserialization / dynamic eval Decryption followed by code execution Remove obfuscated code execution patterns. Legitimate code does not need base64-encoded payloads executed via eval, encrypted-then-executed blobs, or dynamic attribute resolution to call system functions. | Manifest | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:177 | |
| MEDIUM | Unsafe deserialization / dynamic eval Decryption followed by code execution Remove obfuscated code execution patterns. Legitimate code does not need base64-encoded payloads executed via eval, encrypted-then-executed blobs, or dynamic attribute resolution to call system functions. | Manifest | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:283 | |
| MEDIUM | Unsafe deserialization / dynamic eval Decryption followed by code execution Remove obfuscated code execution patterns. Legitimate code does not need base64-encoded payloads executed via eval, encrypted-then-executed blobs, or dynamic attribute resolution to call system functions. | Manifest | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/scripts/checker.js:309 | |
| LOW | Node lockfile missing package.json is present but no lockfile was found (package-lock.json, pnpm-lock.yaml, or yarn.lock). Commit a lockfile for deterministic dependency resolution. | Dependencies | skills/snail3d/voice-devotional/skill-compatibility-checker-skill/package.json |
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