Proofscan MCP Server
proofscan
npm
v0.11.2
Source verified
Published by proofofprotocol — publish provenance cryptographically ties this package to that repository. That is proof of origin, not an official vendor package.
MCP Server scanner - eliminate black boxes by capturing JSON-RPC from connection to tools/list
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 (dist/html/browser.js)MTC-SRC-002
In the server's implementation (`dist/html/browser.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: / import { exec } from 'child_process'; /** * Open a file in the default browser * * Platform-specific commands: * -
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 dist/html/browser.js
high Shell/command execution in server code (dist/html/browser.ts)MTC-SRC-002
In the server's implementation (`dist/html/browser.ts:7`): 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 { exec } from 'child_process'; /** * Open a file in the default browser * * Platform-specific commands: *
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 dist/html/browser.ts
high Shell/command execution in server code (dist/runners/types.js)MTC-SRC-002
In the server's implementation (`dist/runners/types.js:4`): 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'; /** * Common detection logic for runners * @param runnerName - Name of the run
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 dist/runners/types.js
high Shell/command execution in server code (dist/secrets/providers/dpapi.js)MTC-SRC-002
In the server's implementation (`dist/secrets/providers/dpapi.js:12`): 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'; /** Maximum ciphertext length (100KB base64 encoded) */ const MAX_CIPHERTEXT_LEN
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 dist/secrets/providers/dpapi.js
high Shell/command execution in server code (dist/shell/pager/utils.js)MTC-SRC-002
In the server's implementation (`dist/shell/pager/utils.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: ort { spawnSync } from 'child_process'; /** Number of lines reserved for pager footer/prompt */ export const FOOTER_RESE
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 dist/shell/pager/utils.js
high Shell/command execution in server code (dist/shell/repl.js)MTC-SRC-002
In the server's implementation (`dist/shell/repl.js:5`): 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 { SHELL_BUILTINS, TOP_LEVEL_COMMANDS, ROUTER_COMMANDS, BLOCKED_IN_SHELL,
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 dist/shell/repl.js
high Shell/command execution in server code (dist/transports/stdio.js)MTC-SRC-002
In the server's implementation (`dist/transports/stdio.js:5`): 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 { EventEmitter } from 'events'; import { resolveRunnerCommand } from '../
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 dist/transports/stdio.js
high Shell/command execution in server code (dist/utils/clipboard.js)MTC-SRC-002
In the server's implementation (`dist/utils/clipboard.js:4`): 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'; /** * Read text content from system clipboard *
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 dist/utils/clipboard.js
medium Untrusted input concatenated into a command sink (dist/runners/types.js)MTC-SRC-009
In the server's implementation (`dist/runners/types.js:14`): 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 pathOutput = execSync(`${whichCmd} ${runnerName}`, { 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 dist/runners/types.js
medium Untrusted input concatenated into a command sink (dist/secrets/providers/dpapi.js)MTC-SRC-009
In the server's implementation (`dist/secrets/providers/dpapi.js:83`): 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(`powershell -NoProfile -NonInteractive -EncodedCommand ${encodedScript}`, {
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 dist/secrets/providers/dpapi.js
What this scan could not see
- No tools were enumerated, so prompt-injection, capability and toxic-flow analysis had no tool surface to inspect. To grade a package’s real runtime tools, 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 |
|---|---|---|---|---|
v0.11.2 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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