What is CVE-2023-6459?

CVE-2023-6459 is a vulnerability in Mattermost that allows the public /metrics endpoint to reveal channelIDs.

How severe is CVE-2023-6459?

CVE-2023-6459 has a severity rating of medium with a CVSS score of 5.3.

Which version of Mattermost is affected by CVE-2023-6459?

Mattermost versions up to and including 8.1.5 and 7.8.14 are affected by CVE-2023-6459.

How can I fix CVE-2023-6459?

To fix CVE-2023-6459, you should update Mattermost to a version that includes the necessary fixes.

Where can I find more information about CVE-2023-6459?

You can find more information about CVE-2023-6459 in the Mattermost security updates, NVD NIST, and GitHub security advisories.

Vulnerability/
CVE-2023-6459

medium

5.3

CWE

200

EPSS

0.046%

6/12/2023

2/8/2024

CVE-2023-6459: Public endpoint /metrics of Calls plugin reveals channel IDs

First published: Wed Dec 06 2023(Updated: )

Mattermost is grouping calls in the /metrics endpoint by id and reports that id in the response. Since this id is the channelID, the public /metrics endpoint is revealing channelIDs.

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

Affected Software	Affected Version	How to fix
go/github.com/mattermost/mattermost/server/v8	<8.1.5	8.1.5
go/github.com/mattermost/mattermost-server/v6	<7.8.14	7.8.14
Mattermost Mattermost Server	<7.8.14
Mattermost Mattermost Server	>=8.0.0<8.1.5

Remedy

Update Mattermost Server to versions 8.1.5, 7.8.14 or higher.

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Reference Links

Frequently Asked Questions

What is CVE-2023-6459?
CVE-2023-6459 is a vulnerability in Mattermost that allows the public /metrics endpoint to reveal channelIDs.
How severe is CVE-2023-6459?
CVE-2023-6459 has a severity rating of medium with a CVSS score of 5.3.
Which version of Mattermost is affected by CVE-2023-6459?
Mattermost versions up to and including 8.1.5 and 7.8.14 are affected by CVE-2023-6459.
How can I fix CVE-2023-6459?
To fix CVE-2023-6459, you should update Mattermost to a version that includes the necessary fixes.
Where can I find more information about CVE-2023-6459?
You can find more information about CVE-2023-6459 in the Mattermost security updates, NVD NIST, and GitHub security advisories.

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alias/CVE-2023-6459
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package-manager/go
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canonical/mattermost mattermost server
version/mattermost mattermost server/8.0.0

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