What is CVE-2023-5331?

CVE-2023-5331 is a vulnerability in Mattermost where it fails to properly check the creator of an attached file when adding the file to a draft post.

Which versions of Mattermost are affected by CVE-2023-5331?

Mattermost versions up to and including 7.8.11, versions between 8.0.0 and 8.0.3 (exclusive), and versions between 8.1.0 and 8.1.2 (exclusive) are affected.

What is the severity of CVE-2023-5331?

CVE-2023-5331 has a severity rating of medium, with a score of 5.3.

How can I fix the CVE-2023-5331 vulnerability?

To fix the CVE-2023-5331 vulnerability, update your Mattermost server to a version higher than 8.1.2 or apply the necessary patches from Mattermost.

Vulnerability/
CVE-2023-5331

medium

5.3

CWE

862

9/10/2023

5/9/2024

CVE-2023-5331: File Information Leak via IDOR in file_id in Draft Posts

First published: Mon Oct 09 2023(Updated: )

Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially exposing unauthorized file information.

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

Affected Software	Affected Version	How to fix
Mattermost Mattermost Server	<7.8.11
Mattermost Mattermost Server	>=8.0.0<8.0.3
Mattermost Mattermost Server	>=8.1.0<8.1.2

Remedy

Update Mattermost Server to versions 7.8.11, 8.0.3, 8.1.2 or higher.

Never miss a vulnerability like this again

Reference Links

https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2023-5331?
CVE-2023-5331 is a vulnerability in Mattermost where it fails to properly check the creator of an attached file when adding the file to a draft post.
How does Mattermost fail to check the creator of an attached file?
Mattermost fails to properly check the creator of an attached file when adding the file to a draft post, potentially exposing unauthorized file information.
Which versions of Mattermost are affected by CVE-2023-5331?
Mattermost versions up to and including 7.8.11, versions between 8.0.0 and 8.0.3 (exclusive), and versions between 8.1.0 and 8.1.2 (exclusive) are affected.
What is the severity of CVE-2023-5331?
CVE-2023-5331 has a severity rating of medium, with a score of 5.3.
How can I fix the CVE-2023-5331 vulnerability?
To fix the CVE-2023-5331 vulnerability, update your Mattermost server to a version higher than 8.1.2 or apply the necessary patches from Mattermost.

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canonical/mattermost mattermost server
version/mattermost mattermost server/8.0.0
version/mattermost mattermost server/8.1.0

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