Grades are a hygiene check, not a security guarantee.

MCP, MCP server

ipybox

ipybox, 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).

    setup_uv.sh, line 5 curl -LsSf https://astral.sh/uv/install.sh | sh

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

    examples/codexec.py, line 223

    await executor.execute('import subprocess; subprocess.run(["echo", "hi"])')

    ipybox/kernel_mgr/init.py, line 60

    raise RuntimeError('Direct os.system() calls are not allowed. Use ! syntax.')

    docs/codeexec.md, line 84

    These guards are Python-level guards that close the most obvious gaps. They catch accidental bypass (e.g., an LLM agent reaching for `subprocess.run`) but are not a security bounda

    Show more

    docs/internal/architecture.md, line 48

    5. `require_shell_escape=True`: `ContextVar` guard blocks direct process-creation calls (`subprocess.Popen`, `os.system`, `os.exec*`, `os.spawn*`, `os.posix_spawn*`, `pty.spawn`),

  • Install and update

    Serious

    install fetches a script from the network.

    INSTALL_REMOTE_SCRIPT

    setup_uv.sh, line 5

    curl -LsSf https://astral.sh/uv/install.sh | sh

    Dockerfile, line 22

    RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    tasks.py, line 103

    with urllib.request.urlopen(schema_url) as response:

    docs/generated/gentools/github/commits_of_top_repos/api.py, line 31

    top_n_repos: Number of top repos to fetch (default: 3)

    examples/sandbox.py, line 19

    requests.get('https://example.org')

    Show more

    examples/sandbox.py, line 34

    result = requests.get('https://example.org')

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    examples/sandbox.py, line 73

    result = run(Params(path=".env"))

    examples/sandbox.py, line 85

    assert False, "Read access to .env not blocked"

    ipybox/mcp_server.py, line 278

    load_dotenv(args.workspace.absolute() / ".env")

    Show more

    .gitignore, line 18

    .mcpregistry*

    .worktreeinclude, line 1

    .env

    docs/ccplugin.md, line 40

    The [example below](#usage-example) uses the [GitHub MCP server](https://github.com/github/github-mcp-server). Create a `.env` file with your GitHub personal access token (PAT) in

    docs/ccplugin.md, line 42

    ```env title=".env"

    docs/ccplugin.md, line 103

    The `${GITHUB_API_KEY}` placeholder is automatically replaced with the value from your `.env` file.

  • 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).

  • 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 264ed6c9cb0b. requests shell access. The manifest names this permission. install fetches a script from the network. can reach a host that is not written as a fixed address. can reach example.org. 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: 264ed6c9cb0bdd38a50d532299090af15ba57f3c

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