Slack MCP Server

Item: Slack MCP Server
Rating: 64
Author: M8ven

A read-only MCP server that enables AI assistants to access Slack workspace data, including channels, messages, threads, and user information.

→ mynghn/slack-mcp-server · listed on glama

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// key findings

🚨

Known vulnerabilities in dependencies: 1 critical, 2 high

Affects packages this MCP installs at runtime. Upgrade or remove the affected dependency.

🔐

You'll be asked for 2 credentials: SLACK_BOT_TOKEN, SLACK_USER_TOKEN

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// known CVEs in dependencies1 critical2 high

Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.

criticalvitest@3.2.4GHSA-5xrq-8626-4rwp

When Vitest UI server is listening, arbitrary file can be read and executed

high@modelcontextprotocol/sdk@1.25.1GHSA-345p-7cg4-v4c7

@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse

high@modelcontextprotocol/sdk@1.25.1GHSA-8r9q-7v3j-jr4g

Anthropic's MCP TypeScript SDK has a ReDoS vulnerability

Depend on this server? Get alerted when its CVEs change.Watch this server free →

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

🔐 secretSLACK_BOT_TOKEN— export =xoxb-your-token-here

configSLACK_COOKIE_D— export =xoxd-your-cookie-here

configSLACK_CREDENTIALS_PATH— export =/custom/path/credentials.json

configSLACK_REFRESH_ENABLED— export =true

configSLACK_REFRESH_INTERVAL_DAYS

🔐 secretSLACK_USER_TOKEN— export =xoxc-your-token-here

configSLACK_WORKSPACE— export =your-workspace-name # e.g., "mycompany" from mycompany.slack.com

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 8 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/mynghn-slack-mcp-server-1o5fag)](https://m8ven.ai/mcp/mynghn-slack-mcp-server-1o5fag)

commit: 30c0d665d8cf23cb24ab0818f5dae052ebf755c7

code hash: 830ba6db1922bb525ef5d2c71768e9c240ca376d5cf6a42e037ffeb6d8a60bf1

verified: 6/18/2026, 11:43:01 AM

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