Grades are a hygiene check, not a security guarantee.

MCP, MCP server

io.github.EthanQC/feishu-user-plugin

All-in-one Feishu MCP server + CLI tool for Claude Code — send messages as yourself, read chats (auto-expanded merge_forward), manage docs / bitable / wiki (full CRUD) / drive / OKR (with progress writes) / calendar (read+write) / Tasks v2 / multi-profile auto-switch / real-time

Compatibility: Not stated.

Grade D

Two or more Medium findings, or a High finding. Only try it in a sandbox.

Graded by PlugVetRubric v2

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

Rescanned at commit 171e92fdfb35, unchanged since the check below.

INSTALL_REMOTE_SCRIPT SECRETS_PATH_CREDENTIAL

Why this grade

  • INSTALL_REMOTE_SCRIPT High

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

    prompts/openclaw-setup.md, line 6 curl -fsSL https://openclaw.ai/install.sh | bash

  • SECRETS_PATH_CREDENTIAL Medium

    Mentions a credential store path (~/.ssh, id_rsa, .npmrc, .aws/credentials, credentials.json, .netrc).

    scripts/generate-release-artifacts.js, line 162 // Hint: if any bullet mentions "migrate" or "credentials.json", add a tip.

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/build-mcpb.js, line 58

    if (fs.existsSync(OUT)) fs.unlinkSync(OUT);

    scripts/build-mcpb.js, line 99

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

    scripts/test-uat-race.js, line 20

    fs.unlinkSync(path.join(os.homedir(), '.feishu-user-plugin', 'uat-refresh.lock'));

    Show more

    scripts/test-uat-race.js, line 25

    fs.unlinkSync(path.join(os.homedir(), '.claude', 'feishu-uat-refresh.lock'));

    src/test-config-write-safety.js, line 33

    try { fs.rmSync(p, { force: true }); } catch (_) {}

    src/test-config-write-safety.js, line 36

    finally { try { fs.rmSync(p, { force: true }); } catch (_) {} }

    src/test-config-write-safety.js, line 82

    try { fs.rmSync(p, { force: true }); } catch (_) {}

    src/test-config-write-safety.js, line 87

    } finally { try { fs.rmSync(p, { force: true }); } catch (_) {} }

  • Install and update

    Serious

    install fetches a script from the network.

    INSTALL_REMOTE_SCRIPT

    prompts/openclaw-setup.md, line 6

    curl -fsSL https://openclaw.ai/install.sh | bash

    package.json, line 19

    prepare

  • Network

    Concern

    can reach open.feishu.cn. The description does not name that host. can reach a host that is not written as a fixed address.

    NETWORK_NO_FIXED_HOST NETWORK_UNNAMED_HOST

    scripts/verify-app-name.js, line 31

    const tokenRes = await fetch('https://open.feishu.cn/open-apis/auth/v3/app_access_token/internal', {

    scripts/verify-app-name.js, line 42

    const infoRes = await fetch(`https://open.feishu.cn/open-apis/application/v6/applications/${appId}?lang=zh_cn`, {

    src/utils.js, line 43

    return fetch(url, { ...rest, signal: rest.signal || controller.signal }).finally(() => clearTimeout(timer));

    Show more

    src/tools/im-read.js, line 115

    page_size: { type: 'number', description: 'Messages to fetch (default 20, max 50)' },

    src/tools/im-read.js, line 154

    page_size: { type: 'number', description: 'Messages to fetch (default 20, max 50)' },

    docs/superpowers/plans/2026-05-07-v1.3.9-cookie-protobuf-phase2.md, line 750

    # Step C: monkey-patch fetch (same as B.1) intercepts the forwarded send → save to card-1.b64

  • Secrets

    Concern

    reads a credential or environment file.

    SECRETS_ENV_READ SECRETS_PATH_CREDENTIAL

    scripts/explore-card-protobuf.js, line 10

    const env = claudeCfg.mcpServers?.['feishu-user-plugin']?.env || {};

    scripts/explore-card-protobuf.js, line 13

    process.env.LARK_APP_SECRET = env.LARK_APP_SECRET;

    scripts/generate-release-artifacts.js, line 162

    // Hint: if any bullet mentions "migrate" or "credentials.json", add a tip.

    Show more

    scripts/explore-image-minimize.js, line 11

    const env = claudeCfg.mcpServers?.['feishu-user-plugin']?.env || {};

    scripts/explore-image-minimize.js, line 14

    process.env.LARK_APP_SECRET = env.LARK_APP_SECRET;

    scripts/explore-image-minimize.js, line 118

    const oc = new LarkOfficialClient(process.env.LARK_APP_ID, process.env.LARK_APP_SECRET);

    scripts/generate-release-artifacts.js, line 165

    --confirm 把凭证收敛到 ~/.feishu-user-plugin/credentials.json，然后 npx feishu-user-plugin setup --point

    scripts/probe-feishu-docx.js, line 69

    // credentials.getActiveProfileEnv() reads ~/.feishu-user-plugin/credentials.json

    scripts/probe-feishu-docx.js, line 91

    if (process.env.LARK_USER_ACCESS_TOKEN) c.loadUAT();

    scripts/test-wiki-attach-fallback.js, line 44

    const folderToken = process.env.FEISHU_TEST_FOLDER_TOKEN;

    src/cli.js, line 64

    ~/.feishu-user-plugin/credentials.json (single source of truth).

    src/cli.js, line 77

    --force Overwrite existing default profile in credentials.json

    src/cli.js, line 81

    --activate When used with --profile, also flip credentials.json::active

    src/server.js, line 614

    if (hasCanonical && (process.env.LARK_COOKIE || process.env.LARK_APP_ID || process.env.LARK_USER_ACCESS_TOKEN)) {

    src/test-all.js, line 42

    officialClient = new LarkOfficialClient(process.env.LARK_APP_ID, process.env.LARK_APP_SECRET);

    src/test-comprehensive.js, line 124

    const appSecret = process.env.LARK_APP_SECRET;

  • Agent instructions

    Pass

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

  • Obfuscation

    Concern

    contains an encoded blob in a file that should be readable.

    OBFUSCATION_ENCODED_BLOB

    docs/superpowers/plans/2026-05-04-v1.3.7-phase-a-refactor.md, line 43

    │ ├── im.js # listChats/readMessages/getMessage/downloadMessageResource/replyMessage/forwardMessage/sendMessageAsBot/deleteMessage/updateMessage/addReaction/delet

  • 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 171e92fdfb35. can delete files. install fetches a script from the network. can reach open.feishu.cn. The description does not name that host. can reach a host that is not written as a fixed address. reads a credential or environment file. contains an encoded blob in a file that should be readable.

Date and source

Date checked:

View source

github.com

Commit graded: 171e92fdfb35e0371dfb81546e9c1e63e7fc1cda

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