What is the severity of CVE-2024-9155?

CVE-2024-9155 is classified as a high severity vulnerability due to unauthorized access to sensitive channel files.

How do I fix CVE-2024-9155?

To fix CVE-2024-9155, upgrade your Mattermost installation to version 9.10.2 or higher, 9.9.3 or higher, or 9.5.9 or higher.

What versions of Mattermost are affected by CVE-2024-9155?

Mattermost versions 9.10.x up to 9.10.1, 9.9.x up to 9.9.2, and 9.5.x up to 9.5.8 are affected by CVE-2024-9155.

What types of files are vulnerable in CVE-2024-9155?

CVE-2024-9155 allows attackers to view channel files that have not been linked to any posts within channels they belong to.

Can user roles in Mattermost impact CVE-2024-9155?

Yes, user roles in Mattermost may impact the extent of access to vulnerable files as the issue is related to access controls within the channel.

Vulnerability/
CVE-2024-9155

medium

4.3

CWE

863

EPSS

0.043%

26/9/2024

30/9/2024

CVE-2024-9155: Insufficient Authorization On Unlinked Channel Files

First published: Thu Sep 26 2024(Updated: )

Mattermost versions 9.10.x <= 9.10.1, 9.9.x <= 9.9.2, 9.5.x <= 9.5.8 fail to limit access to channels files that have not been linked to a post which allows an attacker to view them in channels that they are a member of.

Credit: responsibledisclosure@mattermost.com

Affected Software	Affected Version	How to fix
Mattermost	<=9.10.1<=9.9.2<=9.5.8

Remedy

Update Mattermost to versions 9.11.0, 9.10.2, 9.9.3, 9.5.9 or higher.

Never miss a vulnerability like this again

Reference Links

https://mattermost.com/security-updates

Frequently Asked Questions

What is the severity of CVE-2024-9155?
CVE-2024-9155 is classified as a high severity vulnerability due to unauthorized access to sensitive channel files.
How do I fix CVE-2024-9155?
To fix CVE-2024-9155, upgrade your Mattermost installation to version 9.10.2 or higher, 9.9.3 or higher, or 9.5.9 or higher.
What versions of Mattermost are affected by CVE-2024-9155?
Mattermost versions 9.10.x up to 9.10.1, 9.9.x up to 9.9.2, and 9.5.x up to 9.5.8 are affected by CVE-2024-9155.
What types of files are vulnerable in CVE-2024-9155?
CVE-2024-9155 allows attackers to view channel files that have not been linked to any posts within channels they belong to.
Can user roles in Mattermost impact CVE-2024-9155?
Yes, user roles in Mattermost may impact the extent of access to vulnerable files as the issue is related to access controls within the channel.

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