What is CVE-2022-2408?

CVE-2022-2408 is a vulnerability in Mattermost version 6.7.0 and earlier that allows a guest user to fetch a list of all public channels in the team, despite not being part of those channels.

What is the severity of CVE-2022-2408?

The severity of CVE-2022-2408 is medium with a CVSS score of 4.3.

How does CVE-2022-2408 affect Mattermost?

CVE-2022-2408 affects Mattermost version 6.7.0 and earlier by failing to properly restrict the permissions of the Guest account feature, allowing a guest user to fetch a list of all public channels.

Which versions of Mattermost are affected by CVE-2022-2408?

Mattermost version 6.7.0 and earlier are affected by CVE-2022-2408.

How can I fix CVE-2022-2408?

To fix CVE-2022-2408, it is recommended to upgrade to a version of Mattermost that is not affected by the vulnerability. Please refer to the vendor's security updates for more information.

Vulnerability/
CVE-2022-2408

medium

4.3

CWE

863 200

14/7/2022

3/8/2024

CVE-2022-2408: Guest accounts can list all public channels

First published: Thu Jul 14 2022(Updated: )

The Guest account feature in Mattermost version 6.7.0 and earlier fails to properly restrict the permissions, which allows a guest user to fetch a list of all public channels in the team, in spite of not being part of those channels.

Credit: responsibledisclosure@mattermost.com

Affected Software	Affected Version	How to fix
Mattermost Mattermost	<6.3.8
Mattermost Mattermost	>=6.4.0<=6.5.1
Mattermost Mattermost	=6.6.0
Mattermost Mattermost	=6.6.1
Mattermost Mattermost	=6.7.0

Remedy

Update Mattermost to version v7.0.0, 6.7.1, 6.6.2, 6.5.2, 6.3.9 or higher.

Never miss a vulnerability like this again

Reference Links

https://mattermost.com/security-updates/

Frequently Asked Questions

What is CVE-2022-2408?
CVE-2022-2408 is a vulnerability in Mattermost version 6.7.0 and earlier that allows a guest user to fetch a list of all public channels in the team, despite not being part of those channels.
What is the severity of CVE-2022-2408?
The severity of CVE-2022-2408 is medium with a CVSS score of 4.3.
How does CVE-2022-2408 affect Mattermost?
CVE-2022-2408 affects Mattermost version 6.7.0 and earlier by failing to properly restrict the permissions of the Guest account feature, allowing a guest user to fetch a list of all public channels.
Which versions of Mattermost are affected by CVE-2022-2408?
Mattermost version 6.7.0 and earlier are affected by CVE-2022-2408.
How can I fix CVE-2022-2408?
To fix CVE-2022-2408, it is recommended to upgrade to a version of Mattermost that is not affected by the vulnerability. Please refer to the vendor's security updates for more information.

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canonical/mattermost mattermost
version/mattermost mattermost/6.4.0
version/mattermost mattermost/6.5.1
version/mattermost mattermost/6.6.0
version/mattermost mattermost/6.6.1
version/mattermost mattermost/6.7.0

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