---
title: Slack
description: Reference information for Slack in Zero Trust integrations.
image: https://developers.cloudflare.com/zt-preview.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/cloudflare-one/llms.txt  
> Use this file to discover all available pages before exploring further.

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### Tags

[ Slack ](https://developers.cloudflare.com/search/?tags=Slack) 

# Slack

The Slack integration detects a variety of data loss prevention, account misconfiguration, and user security risks in an integrated Slack Workspace that could leave you and your organization vulnerable.

## Integration prerequisites

* A Slack user account
* Membership in a Slack Workspace (Free, Pro, Business+, or Enterprise Grid)
* If you are not the Workspace Owner and the `Require App Approval` setting is enabled for the Workspace, [request permission ↗](https://slack.com/help/articles/202035138-Add-apps-to-your-Slack-workspace) to install apps.

## Integration permissions

For the Slack integration to function, Cloudflare CASB requires the following Slack API permissions:

* `channels:read`
* `files:read`
* `groups:read`
* `users:read`

These permissions follow the principle of least privilege to ensure that only the minimum required access is granted. To learn more about each permission, refer to the [Slack Permission scopes reference ↗](https://api.slack.com/scopes).

## Security findings

The Slack integration currently scans for the following findings, or security risks. Findings are grouped by category and then ordered by [severity level](https://developers.cloudflare.com/cloudflare-one/cloud-and-saas-findings/manage-findings/#severity-levels).

To stay up-to-date with new CASB findings as they are added, bookmark this page or subscribe to its [RSS feed](https://github.com/cloudflare/cloudflare-docs/commits/production/src/content/docs/cloudflare-one/integrations/cloud-and-saas/slack.mdx.atom).

### User account settings

| Finding type                                        | FindingTypeID                        | Severity | Description                                                                                            |
| --------------------------------------------------- | ------------------------------------ | -------- | ------------------------------------------------------------------------------------------------------ |
| Slack: User with two-factor authentication disabled | d1cc8596-d22c-435c-9f94-3ba068f019cd | Critical | A user in the Slack Workspace does not have two-factor authentication (2FA) enabled for their account. |
| Slack: User with unverified email                   | 9fa4ae7c-07f0-453a-b232-e734b0f8877c | High     | A user in the Slack Workspace has not verified the email they use to sign in.                          |

### Channel sharing

| Finding type                     | FindingTypeID                        | Severity | Description                                                                                       |
| -------------------------------- | ------------------------------------ | -------- | ------------------------------------------------------------------------------------------------- |
| Slack: Channel shared externally | d298ba64-f013-4e28-b68a-63f758380355 | High     | A channel in the Slack Workspace has been shared with users who are not members of the Workspace. |

### File sharing

| Finding type                                     | FindingTypeID                        | Severity | Description                                                                   |
| ------------------------------------------------ | ------------------------------------ | -------- | ----------------------------------------------------------------------------- |
| Slack: File publicly accessible with view access | 9d96d3a2-696b-4802-98aa-c6c8572e806e | Medium   | An external link has been created for a file uploaded to the Slack Workspace. |
| Slack: File larger than 2 GB                     | c16d64a8-9f78-4f24-99ff-de7fcdc6871b | Low      | A file ≥ 2 GB has been uploaded to the Slack Workspace.                       |

```json
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/cloudflare-one/","name":"Cloudflare One"}},{"@type":"ListItem","position":3,"item":{"@id":"/cloudflare-one/integrations/","name":"Integrations"}},{"@type":"ListItem","position":4,"item":{"@id":"/cloudflare-one/integrations/cloud-and-saas/","name":"Cloud and SaaS integrations"}},{"@type":"ListItem","position":5,"item":{"@id":"/cloudflare-one/integrations/cloud-and-saas/slack/","name":"Slack"}}]}
```