Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Parselbox

Parselbox, an MCP server listed in the PlugVet directory.

Compatibility: Not stated.

Grade C

One Medium finding. Read the report before installing.

Graded by PlugVetRubric v2

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

INSTALL_REMOTE_SCRIPT

Why this grade

  • INSTALL_REMOTE_SCRIPT Medium

    Fetches a script from the network and runs it (a pipe to a shell, or an install hook with a URL).

    .claude/skills/parselbox/SKILL.md, line 62 Requires Deno (`curl -fsSL https://deno.land/install.sh | sh`) and `pip install parselbox`.

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

    Concern

    can delete files.

    PERMISSION_DELETE_FILES

    examples/wasi/compile_c.py, line 47

    os.remove("sysroot.tar")

    parselbox/main.py, line 142

    subprocess.run([deno_path, "--version"], capture_output=True, check=True)

    parselbox/main.py, line 169

    result = subprocess.run(

    Show more

    parselbox/main.py, line 354

    shutil.rmtree(self.tasks_dir)

  • Install and update

    Serious

    install fetches a script from the network.

    INSTALL_REMOTE_SCRIPT

    README.md, line 104

    curl -fsSL https://deno.land/install.sh | sh

    .claude/skills/parselbox/SKILL.md, line 62

    Requires Deno (`curl -fsSL https://deno.land/install.sh | sh`) and `pip install parselbox`.

  • Network

    Concern

    can reach httpbin.org. The description does not name that host. can reach a host that is not written as a fixed address. can reach api.example.com. The description does not name that host.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    examples/parselbox-basics/basics.py, line 131

    r = requests.get('https://httpbin.org/ip', timeout=5)

    examples/parselbox-basics/basics.py, line 141

    requests.get('https://httpbin.org/ip', timeout=2)

    examples/parselbox-basics/serve.py, line 45

    r = requests.get("http://localhost:8080/")

    Show more

    examples/parselbox-basics/serve.py, line 83

    requests.get("http://localhost:8081/api/items").json()

    examples/parselbox-basics/serve.py, line 88

    requests.post("http://localhost:8081/api/items", json={"name": "Item 3"}).json()

    examples/parselbox-basics/serve.py, line 93

    requests.delete("http://localhost:8081/api/items", json={"id": 2}).json()

    examples/parselbox-basics/serve.py, line 98

    requests.get("http://localhost:8081/api/items").json()

    examples/parselbox-basics/serve.py, line 139

    requests.get("http://localhost:8082/api/users").json()

    examples/parselbox-basics/serve.py, line 144

    requests.post("http://localhost:8082/api/users", json={"name": "Bob"}).json()

    examples/parselbox-basics/serve.py, line 149

    requests.get("http://localhost:8082/api/users").json()

    examples/parselbox-basics/serve.py, line 169

    r = requests.post(

    examples/parselbox-basics/tasks.py, line 40

    def fetch(self, id: int) -> dict:

    examples/parselbox-basics/tasks.py, line 108

    seq = [svc.fetch(id=i) for i in range(5)]

    examples/parselbox-basics/tasks.py, line 151

    other = api.fetch(id=1)

    examples/parselbox-basics/toolkit.py, line 30

    def fetch(self, id: int) -> dict:

    examples/wasi/compile_c.py, line 39

    const res = await fetch(url);

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_PATH_DOTENV

    parselbox/prompt.py, line 261

    - `grep -r` auto-skips hidden directories (`.git`, `.env`, etc.)

    parselbox/sandbox/filesystem.ts, line 193

    env: { ...env, HOME: '/workspace', USER: 'user' },

    .dockerignore, line 153

    # Environments

    Show more

    .dockerignore, line 288

    # dotenv environment variable files

    .dockerignore, line 289

    .env

    .dockerignore, line 291

    !.env.example

    .gitignore, line 151

    # Environments

    .gitignore, line 290

    # dotenv environment variable files

  • 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

    uv.lock, line 1

    version = 1

  • Licence

    Pass

    A licence file is present (LICENSE.md).

  • Maintainer activity

    Pass

    The latest commit is within the last 365 days.

Note

Hygiene check of commit 786c27b57433. can delete files. install fetches a script from the network. can reach httpbin.org. The description does not name that host. can reach a host that is not written as a fixed address. can reach api.example.com. The description does not name that host. reads a credential or environment file. a file was over the read cap and was not fully read.

Date and source

Date checked:

View source

github.com

Commit graded: 786c27b5743360be87327ae8dfae9a63969a8b84

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