Mcpretentious MCP Server
mcpretentious
npm
v1.3.0
Source verified
Published by oetiker — publish provenance cryptographically ties this package to that repository. That is proof of origin, not an official vendor package.
MCPretentious - Universal Terminal MCP. High-performance terminal automation for iTerm2 (WebSocket) and tmux (control mode). Cross-platform support with cursor position, colors, and layered screenshots.
The grade answers one question — how safe is this server for you to adopt — so it is computed in two auditable stages. Nothing below is an opinion or an LLM's guess; every line is a real term the deterministic engine applied, and the same input always yields the same number.
1. Threat score — 100 − 9.5 = 91. What the published surface and source actually contain:
| Points | What was found | Category |
|---|---|---|
| −9.5 | Untrusted input concatenated into a command sink ×2 MTC-SRC-009 | injection |
2. Client adoption risk — 91 − 6 = 85. Three small, subtract-only factors that reflect your risk in adopting it — a clean scan proves less on a powerful, unverified or barely-inspectable package, so the grade says so plainly:
| Points | Adoption-risk factor |
|---|---|
| −6 | capability blast radius (high) — client exposure if the model is manipulated |
Capability observations and info notes are shown under Findings but never scored.
Open any row's finding below for the file, line and evidence behind a deduction.
Findings 10
high Shell/command execution in server code (lib/focus-manager.js)MTC-SRC-002
In the server's implementation (`lib/focus-manager.js:11`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: port { execSync } from 'child_process'; /** * Get the currently focused application and window * @returns {Object|nul
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server lib/focus-manager.js
high Shell/command execution in server code (lib/iterm2-backend.js)MTC-SRC-002
In the server's implementation (`lib/iterm2-backend.js:10`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: port { execSync } from 'child_process'; import { platform } from 'os'; import { generateMouseEvent } from './mouse-sgr-p
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server lib/iterm2-backend.js
high Shell/command execution in server code (lib/iterm2-client.js)MTC-SRC-002
In the server's implementation (`lib/iterm2-client.js:15`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: port { execSync } from 'child_process'; import { fileURLToPath } from 'url'; import { parseLineWithStyles, getCharacterS
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server lib/iterm2-client.js
high Shell/command execution in server code (lib/tmux-backend.js)MTC-SRC-002
In the server's implementation (`lib/tmux-backend.js:11`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: port { execSync } from 'child_process'; export class TmuxBackend extends TerminalBackend { constructor() { super(
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server lib/tmux-backend.js
high Shell/command execution in server code (lib/tmux-client-simple.js)MTC-SRC-002
In the server's implementation (`lib/tmux-client-simple.js:6`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: port { execSync } from 'child_process'; import { randomBytes } from 'crypto'; // Mouse protocol support is handled direc
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server lib/tmux-client-simple.js
high Shell/command execution in server code (mcpretentious-test.js)MTC-SRC-002
In the server's implementation (`mcpretentious-test.js:9`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: import { spawn } from 'child_process'; import { fileURLToPath } from 'url'; import { dirname, join } from 'path'; cons
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server mcpretentious-test.js
medium Untrusted input concatenated into a command sink (lib/focus-manager.js)MTC-SRC-009
In the server's implementation (`lib/focus-manager.js:21`): A shell/process command assembled from concatenated or interpolated values is command injection when any part is attacker-influenced — the OWASP canonical RCE flow. Verify what reaches the interpolated value. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: (); const appInfo = execSync(`lsappinfo info -only name -only bundleid ${frontASN} 2>/dev/null`, { encoding: 'utf-8'
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server lib/focus-manager.js
medium Untrusted input concatenated into a command sink (lib/iterm2-client.js)MTC-SRC-009
In the server's implementation (`lib/iterm2-client.js:121`): A shell/process command assembled from concatenated or interpolated values is command injection when any part is attacker-influenced — the OWASP canonical RCE flow. Verify what reaches the interpolated value. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: { const result = execSync(`osascript -e '${script}' 2>&1`, { encoding: 'utf-8', stdio: 'pipe'
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server lib/iterm2-client.js
low Shell/command execution in packaging/dev tooling (test/integration.test.mjs)MTC-SRC-002
In a packaging/dev/install script (shipped, but not the server runtime) (`test/integration.test.mjs:10`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: , execSync } from 'node:child_process'; import { promisify } from 'node:util'; import { fileURLToPath } from 'node:url';
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server test/integration.test.mjs
low Shell/command execution in packaging/dev tooling (test/mock.test.mjs)MTC-SRC-002
In a packaging/dev/install script (shipped, but not the server runtime) (`test/mock.test.mjs:10`): Spawning a shell/process is command-execution capability; with unsanitized tool input it is command injection / RCE. This is read from the code itself — not from the tool description — so a poisoned server cannot hide it behind honest-looking metadata.
Evidence: rt { spawn } from 'node:child_process'; import { fileURLToPath } from 'node:url'; import { dirname, join } from 'node:pa
Fix: Review this call path: confirm it never receives unsanitized tool input, constrain it, or remove it. Treat a server whose code reaches these sinks as high-capability regardless of what its tools claim.
Location: server test/mock.test.mjs
Tools 9
Each tool and what it can reach — statically extracted from the published source.
mcpretentious-closeno sensitive capabilitymcpretentious-infono sensitive capabilitymcpretentious-listno sensitive capabilitymcpretentious-mouseno sensitive capabilitymcpretentious-openno sensitive capabilitymcpretentious-readno sensitive capabilitymcpretentious-resizeno sensitive capabilitymcpretentious-screenshotno sensitive capabilitymcpretentious-typeno sensitive capability
What this scan could not see
- Tools were statically extracted from the published source (9 recovered), not enumerated from a running server. Tool-poisoning, Unicode-smuggling, capability and toxic-flow analysis ran on this inferred surface, but a mis-parsed registration could be missed or mis-attributed, so tool-derived findings are capped below “confirmed”. To grade the real runtime surface, scan the running server: --command "npx -y <package>".
Versions 1
Scan history per published version. The engine is deterministic — the same version always yields the same score, so a changed score means the package itself changed.
| Version | Score | Findings | Engine | Scanned |
|---|---|---|---|---|
v1.3.0 latest |
B 85/100 | 10 | 1.13.0 | 2026-09-07 |
Embed this score
Show this server's live Trust Score in your README, docs or website. The badge is served straight from the registry and updates automatically after every rescan — no API key needed. It links back to this page, so anyone who sees the grade can also read the findings behind it instead of taking a number on faith.
Verify this score yourself
The score above is reproducible: the same package version always yields the same result. Run it locally or over the free API — no account, no LLM, fully deterministic.
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