Grades are a hygiene check, not a security guarantee.

Cursor, Plugin

Web Retrieval Mcp

MCP server for AI agents: high-fidelity web search (Exa) + tiered web fetch (Exa→browser→Firecrawl) with SSRF guard.

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 c0ee5646d2c2, unchanged since the check below.

NETWORK_NO_FIXED_HOST SECRETS_PATH_UNCONFIRMED PERMISSION_SHELL_DECLARED SECRETS_ENV_READ

Why this grade

  • NETWORK_NO_FIXED_HOST Low

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

    test_fetch_policy_acceptance.py, line 293 def fetch(daemon: MCPDaemon, **arguments):

  • SECRETS_PATH_UNCONFIRMED Low

    The Secrets check reports a credential or environment file, but no quoted line shows a recognisable path.

    valkey_test_support.py, line 42 supplied = os.environ.get("WEBRET_TEST_VALKEY_ROOT")

  • PERMISSION_SHELL_DECLARED Note

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

    test_fetch_policy_acceptance.py, line 256 self.process = subprocess.Popen(

  • SECRETS_ENV_READ Note

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

    valkey_test_support.py, line 42 supplied = os.environ.get("WEBRET_TEST_VALKEY_ROOT")

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

    test_fetch_policy_acceptance.py, line 256

    self.process = subprocess.Popen(

    test_http_transport.py, line 84

    proc = subprocess.Popen(

    valkey_test_support.py, line 49

    result = subprocess.run(

    Show more

    valkey_test_support.py, line 76

    self.process: subprocess.Popen[str] | None = None

    valkey_test_support.py, line 89

    return subprocess.run(

    valkey_test_support.py, line 101

    self.process = subprocess.Popen(

    src/web_retrieval_mcp/install.py, line 184

    completed = subprocess.run(command, check=False)

    src/web_retrieval_mcp/server.py, line 558

    completed = subprocess.run(

  • 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

    test_fetch_policy_acceptance.py, line 293

    def fetch(daemon: MCPDaemon, **arguments):

    test_fetch_policy_acceptance.py, line 303

    output = fetch(daemon, **arguments)

    test_fetch_policy_acceptance.py, line 312

    rich = fetch(daemon, url=RICH_PAGE, render="auto", max_chars=5000)

    Show more

    test_fetch_policy_acceptance.py, line 318

    large = fetch(daemon, url=RICH_PAGE, render="auto", max_chars=20000)

    test_fetch_policy_acceptance.py, line 324

    thin = fetch(daemon, url=THIN_PAGE, render="auto", max_chars=5000)

    test_fetch_policy_acceptance.py, line 331

    never = fetch(daemon, url=RICH_PAGE, render="never", max_chars=5000)

    test_fetch_policy_acceptance.py, line 338

    concise = fetch(daemon, url=RICH_PAGE, render="auto", mode="concise", max_chars=20000)

    test_fetch_policy_acceptance.py, line 345

    always = fetch(daemon, url=RICH_PAGE, render="always", max_chars=5000)

    test_fetch_policy_acceptance.py, line 497

    private = fetch(daemon, url="http://127.0.0.1/private", render="never", max_chars=5000)

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_UNCONFIRMED

    valkey_test_support.py, line 42

    supplied = os.environ.get("WEBRET_TEST_VALKEY_ROOT")

    src/web_retrieval_mcp/fetch_cache.py, line 411

    public_override = os.environ.get("WEB_RETRIEVAL_MCP_VALKEY_SOCKET")

    src/web_retrieval_mcp/fetch_cache.py, line 419

    override = os.environ.get("WEBRET_ACCEPTANCE_VALKEY_SOCKET")

    Show more

    .gitignore, line 5

    venv/

  • Agent instructions

    Pass

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

  • Obfuscation

    Pass

    No encoded or minified payload found.

  • 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 c0ee5646d2c2. requests shell access. The manifest names this permission. can reach a host that is not written as a fixed address. reads a credential or environment file.

Date and source

Date checked:

View source

github.com

Commit graded: c0ee5646d2c23ae27692d52f4c74387180c6cf24

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Read how this letter is chosen