Trust Assessment
Mersal 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 5 findings: 3 critical, 0 high, 1 medium, and 1 low severity. Key findings include Arbitrary command execution, Unpinned npm dependency version, Node lockfile missing.
The analysis covered 4 layers: Manifest Analysis, Static Code Analysis, Dependency Graph, LLM Behavioral Safety. The Manifest Analysis layer scored lowest at 40/100, indicating areas for improvement.
Last analyzed on February 13, 2026 (commit 13146e6a). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.
Layer Breakdown
Behavioral Risk Signals
Security Findings5
| Severity | Finding | Layer | Location | |
|---|---|---|---|---|
| CRITICAL | Arbitrary command execution Python dynamic code execution (exec/eval/compile) 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/maherucifer/mersal/index.js:13 | |
| 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/maherucifer/mersal/index.js:2 | |
| CRITICAL | Command Injection via child_process.exec The `runEgoFilter` function in `index.js` constructs a shell command using `child_process.exec` and directly interpolates the `text` argument. The skill's description explicitly states that the 'Ego Filter' is for 'Analyzing external inputs'. If `text` originates from an untrusted source (e.g., user messages, API calls from Moltbook), an attacker can inject arbitrary shell commands, leading to remote code execution on the host system. Sanitize or escape the `text` input before passing it to `exec`. A safer alternative is to use `child_process.spawn` with the command and arguments passed as an array, which prevents shell interpretation. For example: `spawn('python3', ['src/ego_analyzer.py', text])`. | LLM | index.js:20 | |
| MEDIUM | Unpinned npm dependency version Dependency 'clawdhub' is not pinned to an exact version ('^0.3.0'). Pin dependencies to exact versions to reduce drift and supply-chain risk. | Dependencies | skills/maherucifer/mersal/package.json | |
| 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/maherucifer/mersal/package.json |
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