What is CVE-2023-3587?

CVE-2023-3587 is a vulnerability in Mattermost Server that allows a system admin to modify a board state, granting unauthorized access to users with a valid sharing link.

How does Mattermost fail to show information in the UI?

Mattermost fails to display updated permissions in the UI, allowing users with a valid sharing link to join a board with editor access even if their permissions have been modified.

Which versions of Mattermost Server are affected by CVE-2023-3587?

Mattermost Server versions 7.8.0 to 7.8.7 and versions 7.10.0 to 7.10.3 are affected by CVE-2023-3587.

What is the severity of CVE-2023-3587?

CVE-2023-3587 has a severity value of 2.7, which is considered low.

How can I fix the CVE-2023-3587 vulnerability in Mattermost Server?

To fix the CVE-2023-3587 vulnerability, you should update Mattermost Server to a version higher than 7.8.7 or 7.10.3 where the issue is patched.

Vulnerability/
CVE-2023-3587

low

2.7

CWE

862

17/7/2023

22/10/2024

CVE-2023-3587: Inconsistent state in UI after boards permission change by system admin

First published: Mon Jul 17 2023(Updated: )

Mattermost fails to properly show information in the UI, allowing a system admin to modify a board state allowing any user with a valid sharing link to join the board with editor access, without the UI showing the updated permissions.

Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com

Affected Software	Affected Version	How to fix
Mattermost Mattermost Server	>=7.8.0<7.8.7
Mattermost Mattermost Server	>=7.10.0<7.10.3

Remedy

Update Mattermost Server to versions 7.8.7, 7.9.5, 7.10.3 or higher.

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Reference Links

https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2023-3587?
CVE-2023-3587 is a vulnerability in Mattermost Server that allows a system admin to modify a board state, granting unauthorized access to users with a valid sharing link.
How does Mattermost fail to show information in the UI?
Mattermost fails to display updated permissions in the UI, allowing users with a valid sharing link to join a board with editor access even if their permissions have been modified.
Which versions of Mattermost Server are affected by CVE-2023-3587?
Mattermost Server versions 7.8.0 to 7.8.7 and versions 7.10.0 to 7.10.3 are affected by CVE-2023-3587.
What is the severity of CVE-2023-3587?
CVE-2023-3587 has a severity value of 2.7, which is considered low.
How can I fix the CVE-2023-3587 vulnerability in Mattermost Server?
To fix the CVE-2023-3587 vulnerability, you should update Mattermost Server to a version higher than 7.8.7 or 7.10.3 where the issue is patched.

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