Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Browser Gateway

Browser Gateway, an MCP server listed in the PlugVet directory.

Compatibility: Not stated.

Grade D

Two or more Medium findings, or a High finding. Only try it in a sandbox.

Graded by PlugVetRubric v2

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

Rescanned at commit df79d15c66eb.

Pattern found, check before installing

The checks matched a pattern that needs a closer look. It does not mean the code is harmful. Read the quoted lines below.

  • NETWORK_HOST_FROM_INPUT High

    host from input plus a credential path in operative code

NETWORK_HOST_FROM_INPUT INSTALL_LIFECYCLE_HOOK SECRETS_PATH_CREDENTIAL

Why this grade

  • NETWORK_HOST_FROM_INPUT High

    A file takes a URL or endpoint as input and has no fixed host list.

    src/live-client/client.ts, line 106 const ws = new WebSocket(url);

  • INSTALL_LIFECYCLE_HOOK Medium

    A package install hook (preinstall, install, postinstall or prepare) runs a script.

    package.json, line 160 prepare

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    src/server/browse/credentials.ts, line 11 const CREDENTIALS_PATH = join(CONFIG_DIR, "credentials.json");

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.

If you think this grade is wrong, email [email protected] with the entry link and your evidence. We aim to acknowledge within two working days and decide within seven. If we confirm an error, we aim to correct it within 24 hours of confirming it. These are aims, not guarantees.

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

    Concern

    runs a script at install time.

    INSTALL_LIFECYCLE_HOOK

    package.json, line 160

    prepare

  • Network

    Serious

    accepts a host from input, with no fixed list in this file.

    NETWORK_HOST_FROM_INPUT

    src/live-client/client.ts, line 106

    const ws = new WebSocket(url);

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL SECRETS_PATH_DOTENV

    src/server/index.ts, line 208

    const token = process.env.BG_TOKEN;

    src/server/browse/cli.ts, line 64

    const token = flags.token ?? process.env.BG_TOKEN;

    src/server/browse/credentials.ts, line 11

    const CREDENTIALS_PATH = join(CONFIG_DIR, "credentials.json");

    Show more

    src/server/browse/credentials.ts, line 43

    const token = flags.token ?? process.env.BG_TOKEN ?? saved?.token;

    src/server/setup/encryption-key.ts, line 37

    const fromEnv = process.env.BG_ENCRYPTION_KEY;

    src/server/setup/port.ts, line 15

    return process.env.BG_TOKEN ? "0.0.0.0" : "127.0.0.1";

    src/server/index.ts, line 13

    const envPath = join(process.cwd(), ".env");

    src/server/index.ts, line 335

    ? "Ask the user for the gateway token. It is the `BG_TOKEN` value in the gateway's `.env` file."

    .dockerignore, line 7

    .env

  • Agent instructions

    Pass

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

  • Obfuscation

    Note

    a file was over the read cap and was not fully read. the file cap was reached before every file was read.

    OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED

    package-lock.json, line 1

    {

    web/package-lock.json, line 1

    {

    web/public/integrations/stagehand.png, line 1

    �PNG

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Get the full report on this tool, £49

Note

Hygiene check of commit df79d15c66eb. runs a script at install time. accepts a host from input, with no fixed list in this file. reads a credential or environment file. a file was over the read cap and was not fully read. the file cap was reached before every file was read.

Date and source

Date checked:

View source

github.com

Commit graded: df79d15c66eb47473251d3a82e9fed662ea326e7

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