Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.AetherAI3/agent-browser

io.github.AetherAI3/agent-browser, 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.

Rescanned at commit 23f050c5a163, unchanged since the check below.

PERMISSION_DELETE_FILES NETWORK_NO_FIXED_HOST SECRETS_PATH_DOTENV SECRETS_ENV_READ

Why this grade

  • PERMISSION_DELETE_FILES Low

    Contains a call that can delete files.

    clients/python/src/aether_browser/cli.py, line 64 return subprocess.run(command, capture_output=True, text=True, check=False) # noqa: S603

  • NETWORK_NO_FIXED_HOST Low

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

    clients/node/src/cli.js, line 73 const curl = run('curl', ['-fsSL', '--proto', '=https', '--tlsv1.2', '-o', tarball, url], {

  • SECRETS_PATH_DOTENV Low

    Mentions a .env file.

    .gitignore, line 11 .env

  • SECRETS_ENV_READ Note

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

    clients/node/src/cli.js, line 173 if (process.env.AGENT_BROWSER_CONTROLLER_TOKEN) ok('AGENT_BROWSER_CONTROLLER_TOKEN is set')

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

    clients/python/src/aether_browser/cli.py, line 64

    return subprocess.run(command, capture_output=True, text=True, check=False) # noqa: S603

    clients/python/src/aether_browser/cli.py, line 110

    shutil.rmtree(target, ignore_errors=True)

    clients/python/src/aether_browser/cli.py, line 116

    shutil.rmtree(target, ignore_errors=True)

    Show more

    clients/python/src/aether_browser/cli.py, line 246

    result = subprocess.run(command, cwd=found[0], check=False) # noqa: S603

    clients/python/src/aether_browser/cli.py, line 265

    result = subprocess.run(command, cwd=found[0], check=False) # noqa: S603

    scripts/verify_release.py, line 90

    result = subprocess.run( # noqa: S603 - commands are fixed release-gate argv

    scripts/verify_release.py, line 110

    result = subprocess.run( # noqa: S603 - resolved executable and fixed argv

  • 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

    clients/node/src/cli.js, line 73

    const curl = run('curl', ['-fsSL', '--proto', '=https', '--tlsv1.2', '-o', tarball, url], {

    clients/python/src/aether_browser/_client.py, line 123

    with urllib.request.urlopen(request, timeout=timeout) as reply: # noqa: S310

    examples/curl.sh, line 9

    curl -fsS -X POST "$api_base/browser/session/end" \

    Show more

    examples/curl.sh, line 16

    command -v curl >/dev/null 2>&1 || { echo "curl is required" >&2; exit 1; }

    examples/curl.sh, line 19

    curl -fsS "$api_base/browser/health" | jq .

    examples/curl.sh, line 22

    curl -fsS -X POST "$api_base/browser/session/create" \

    examples/curl.sh, line 29

    curl -fsS -X POST "$api_base/browser/navigate" \

    examples/curl.sh, line 34

    curl -fsS -X POST "$api_base/browser/snapshot" \

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    clients/node/src/cli.js, line 173

    if (process.env.AGENT_BROWSER_CONTROLLER_TOKEN) ok('AGENT_BROWSER_CONTROLLER_TOKEN is set')

    clients/python/src/aether_browser/cli.py, line 206

    if os.environ.get("AGENT_BROWSER_CONTROLLER_TOKEN"):

    .gitignore, line 11

    .env

    Show more

    examples/demo.py, line 106

    default=os.environ.get("AGENT_BROWSER_CONTROLLER_TOKEN"),

    examples/demo.py, line 111

    default=os.environ.get("AGENT_BROWSER_OBSERVER_TOKEN"),

    src/agent_browser/main.py, line 116

    observer_token=os.getenv("AGENT_BROWSER_OBSERVER_TOKEN"),

    src/agent_browser/main.py, line 117

    controller_token=os.getenv("AGENT_BROWSER_CONTROLLER_TOKEN"),

    .gitignore, line 10

    build/

    .gitignore, line 13

    !.env.example

  • 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.

Note

Hygiene check of commit 23f050c5a163. can delete files. 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: 23f050c5a163923ce4624053cc0466c69b72bc51

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