What is the severity of CVE-2024-39807?

CVE-2024-39807 has a medium severity rating due to the potential exposure of channel IDs in archived or restored channels.

How do I fix CVE-2024-39807?

To fix CVE-2024-39807, upgrade Mattermost to version 9.5.6 or later, or to version 9.8.1 or later.

What versions of Mattermost are affected by CVE-2024-39807?

Mattermost versions 9.5.0 to 9.5.5 and 9.8.0 are affected by CVE-2024-39807.

What type of attack is associated with CVE-2024-39807?

CVE-2024-39807 is associated with an information disclosure attack that allows an attacker to monitor webhook events.

Can CVE-2024-39807 affect my organization’s data?

Yes, CVE-2024-39807 can potentially expose sensitive channel IDs, which may compromise the confidentiality of your organization’s data.

Vulnerability/
CVE-2024-39807

medium

5.3

CWE

200

3/7/2024

5/7/2024

CVE-2024-39807: Channel IDs of archived/restored channels leaked via webhook events

First published: Wed Jul 03 2024(Updated: )

Mattermost versions 9.5.x <= 9.5.5 and 9.8.0 fail to properly sanitize the recipients of a webhook event which allows an attacker monitoring webhook events to retrieve the channel IDs of archived or restored channels.

Credit: responsibledisclosure@mattermost.com

Affected Software	Affected Version	How to fix
Mattermost	>=9.5.0<9.5.6
Mattermost	>=9.8.0<9.8.1

Remedy

Update Mattermost to versions 9.9.0, 9.8.1, 9.5.6 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-2024-39807?
CVE-2024-39807 has a medium severity rating due to the potential exposure of channel IDs in archived or restored channels.
How do I fix CVE-2024-39807?
To fix CVE-2024-39807, upgrade Mattermost to version 9.5.6 or later, or to version 9.8.1 or later.
What versions of Mattermost are affected by CVE-2024-39807?
Mattermost versions 9.5.0 to 9.5.5 and 9.8.0 are affected by CVE-2024-39807.
What type of attack is associated with CVE-2024-39807?
CVE-2024-39807 is associated with an information disclosure attack that allows an attacker to monitor webhook events.
Can CVE-2024-39807 affect my organization’s data?
Yes, CVE-2024-39807 can potentially expose sensitive channel IDs, which may compromise the confidentiality of your organization’s data.

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