Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.MasonChow/source-map-parser-mcp

io.github.MasonChow/source-map-parser-mcp, an MCP server listed in the PlugVet directory.

Compatibility: Not stated.

Grade B

Minor issues only, no Medium or High. Worth a quick look at the findings below before installing.

Graded by PlugVetRubric v2

Not a guarantee. A hygiene check of the source at the commit shown, not a security audit.

Rescanned at commit 2c21e0b87486, unchanged since the check below.

NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV OBFUSCATION_MINIFIED_PAYLOAD

Why this grade

  • NETWORK_NO_FIXED_HOST Low

    Makes a network call whose host is not written as a fixed address.

    example/foo-special.js, line 1 (j){if(j.ep)return;j.ep=!0;const w=$(j);fetch(j.href,w)}})();var $c={exports:{}},me={}

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .gitignore, line 75 # dotenv environment variable files

  • OBFUSCATION_MINIFIED_PAYLOAD Low

    Contains a very long line with almost no spaces in a script or style file.

    example/foo-special.js, line 43 `+Cn+l+ri}var Vn=!1;function Ln(l,t){if(!l||Vn)return"";Vn=!0;var u=Error.prepareStackTrace;Error.prepareStackTrace=void 0;try{var a={DetermineComponentFrameRoot:function(){try{if(

Any High, or two or more Medium findings, give D. One Medium gives C. Low findings or a security Note give B. Each code names a finding behind the letter.

Grades are a hygiene check of the source at the commit shown, on the date checked, not a security audit or a guarantee. The free directory grades are automated. Before release, a PlugVet engineer reviews every paid report and any grade we hold back, including all F grades, against the source code and the evidence we quote.

What was checked

Plain notes from the hygiene checks.

  • Permissions

    Pass

    No shell or command execution found, and no extra permission was declared.

  • Install and update

    Pass

    No install-time script found, and dependencies are pinned or absent.

  • Network

    Concern

    can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST

    example/foo-special.js, line 1

    (j){if(j.ep)return;j.ep=!0;const w=$(j);fetch(j.href,w)}})();var $c={exports:{}},me={}

    example/index.js, line 1

    (j){if(j.ep)return;j.ep=!0;const w=$(j);fetch(j.href,w)}})();var $c={exports:{}},me={}

    src/cachingFetch.ts, line 32

    return fetch(url, options);

    Show more

    src/cachingFetch.ts, line 46

    const response = await fetch(url, options);

    src/parser.ts, line 136

    const res = await fetch(url, {

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    .gitignore, line 75

    # dotenv environment variable files

    .gitignore, line 76

    .env

    .gitignore, line 77

    .env.development.local

    Show more

    .gitignore, line 78

    .env.test.local

    .gitignore, line 79

    .env.production.local

  • Agent instructions

    Pass

    No instruction to ignore earlier instructions or to hide a step.

  • Obfuscation

    Concern

    contains a minified payload.

    OBFUSCATION_MINIFIED_PAYLOAD

    example/foo-special.js, line 43

    `+Cn+l+ri}var Vn=!1;function Ln(l,t){if(!l||Vn)return"";Vn=!0;var u=Error.prepareStackTrace;Error.prepareStackTrace=void 0;try{var a={DetermineComponentFrameRoot:function(){try{if(

    example/foo-special.js, line 48

    `+u.stack}}function ut(l){switch(typeof l){case"bigint":case"boolean":case"number":case"string":case"undefined":return l;case"object":return l;default:return""}}function gi(l){var

    example/foo-special.js, line 49

    `).replace($d,"")}function Av(l,t){return t=Ev(t),Ev(l)===t}function bn(){}function P(l,t,u,a,e,n){switch(u){case"children":typeof a=="string"?t==="body"||t==="textarea"&&a===""||j

    Show more

    example/index.js, line 43

    `+Cn+l+ri}var Vn=!1;function Ln(l,t){if(!l||Vn)return"";Vn=!0;var u=Error.prepareStackTrace;Error.prepareStackTrace=void 0;try{var a={DetermineComponentFrameRoot:function(){try{if(

    example/index.js, line 48

    `+u.stack}}function ut(l){switch(typeof l){case"bigint":case"boolean":case"number":case"string":case"undefined":return l;case"object":return l;default:return""}}function gi(l){var

    example/index.js, line 49

    `).replace($d,"")}function Av(l,t){return t=Ev(t),Ev(l)===t}function bn(){}function P(l,t,u,a,e,n){switch(u){case"children":typeof a=="string"?t==="body"||t==="textarea"&&a===""||j

    example/index.js.map, line 1

    {"version":3,"file":"index-DZaFENjX.js","sources":["../../node_modules/.pnpm/[email protected]/node_modules/react/cjs/react-jsx-runtime.production.js","../../node_modules/.pnpm/react@19

    example/special/foo.js.map, line 1

    {"version":3,"file":"index-DZaFENjX.js","sources":["../../node_modules/.pnpm/[email protected]/node_modules/react/cjs/react-jsx-runtime.production.js","../../node_modules/.pnpm/react@19

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Note

    the latest commit is more than 365 days old.

    MAINTAINER_STALE

    No file path was stored.

    2025-09-28T22:59:29+08:00

Get the full report on this tool, £49

Note

Hygiene check of commit 2c21e0b87486. can reach a host that is not written as a fixed address. reads a credential or environment file. contains a minified payload. the latest commit is more than 365 days old.

Date and source

Date checked:

View source

github.com

Commit graded: 2c21e0b8748693f73b476ffacbff50fc3c2d0bf2

This link goes to the original host. PlugVet does not host or check what you download from there, and installing it is your own decision and risk.

Read how this letter is chosen