Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Nexus Browser Mcp

Nexus Browser 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.

NETWORK_NO_FIXED_HOST PERMISSION_SHELL_DECLARED SECRETS_ENV_READ OBFUSCATION_FILE_OVER_READ_CAP

Why this grade

  • NETWORK_NO_FIXED_HOST Low

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

    bench/e2e_llm.py, line 62 with urllib.request.urlopen(req, timeout=120) as r:

  • PERMISSION_SHELL_DECLARED Note

    Runs shell commands, and the manifest or description says so.

    smokes/test_e2e_http.py, line 18 def _wait_port(port: int, proc: subprocess.Popen, timeout: float = 20) -> None:

  • SECRETS_ENV_READ Note

    Reads an environment variable whose name contains KEY, SECRET, TOKEN, PASSWORD or CREDENTIAL.

    bench/e2e_llm.py, line 40 API_KEY = os.environ.get("SILICONFLOW_API_KEY", "")

  • OBFUSCATION_FILE_OVER_READ_CAP Note

    A file was over the read cap and was not fully read.

    docs/bench/scale-ops.json, line 1 {

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

    Note

    requests shell access. The manifest names this permission.

    PERMISSION_SHELL_DECLARED

    smokes/test_e2e_http.py, line 18

    def _wait_port(port: int, proc: subprocess.Popen, timeout: float = 20) -> None:

    smokes/test_e2e_http.py, line 61

    proc = subprocess.Popen([sys.executable, "-m", "nexus_browser.server"],

  • 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

    bench/e2e_llm.py, line 62

    with urllib.request.urlopen(req, timeout=120) as r:

    bench/e2e_llm.py, line 181

    with urllib.request.urlopen(req, timeout=10) as r:

    bench/judge.py, line 43

    with urllib.request.urlopen(req, timeout=120) as r:

    Show more

    smokes/test_e2e_http.py, line 24

    with socket.create_connection(("127.0.0.1", port), timeout=1):

    smokes/test_e2e_observability.py, line 27

    fetch("http://127.0.0.1:9/api").catch(() => {});

  • Secrets

    Note

    reads an environment variable.

    SECRETS_ENV_READ

    bench/e2e_llm.py, line 40

    API_KEY = os.environ.get("SILICONFLOW_API_KEY", "")

    bench/judge.py, line 27

    API_KEY = os.environ.get("SILICONFLOW_API_KEY", "")

  • 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.

    OBFUSCATION_FILE_OVER_READ_CAP

    docs/bench/scale-ops.json, line 1

    {

  • Licence

    Pass

    A licence file is present (LICENSE).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Note

Hygiene check of commit 9501512bf9c0. requests shell access. The manifest names this permission. can reach a host that is not written as a fixed address. reads an environment variable. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: 9501512bf9c067b04a95ea726d5f1523a7d15576

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