What is the severity of CVE-2019-20844?

CVE-2019-20844 has been classified as a medium severity vulnerability due to its potential for misuse in channel spoofing.

How do I fix CVE-2019-20844?

To fix CVE-2019-20844, update Mattermost Server to version 5.18.0 or later.

What does CVE-2019-20844 affect?

CVE-2019-20844 affects Mattermost Server versions prior to 5.18.0, along with several earlier versions.

Can CVE-2019-20844 lead to data breaches?

Yes, CVE-2019-20844 can potentially lead to data breaches by allowing an attacker to spoof private messaging channels.

Is there a workaround for CVE-2019-20844?

There is no official workaround for CVE-2019-20844; updating to a secure version is the only recommendation.

Vulnerability/
CVE-2019-20844

medium

6.5

CWE

924

19/6/2020

5/8/2024

CVE-2019-20844

First published: Fri Jun 19 2020(Updated: )

An issue was discovered in Mattermost Server before 5.18.0, 5.17.2, 5.16.4, 5.15.4, and 5.9.7. An attacker can spoof a direct-message channel by changing the type of a channel.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Mattermost	<5.9.7
Mattermost	>=5.15.0<5.15.4
Mattermost	>=5.16.0<5.16.4
Mattermost	>=5.17.0<5.17.2
Mattermost	=5.18.0-rc1
Mattermost	=5.18.0-rc2
Mattermost	=5.18.0-rc3
Mattermost	=5.18.0-rc4

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Reference Links

https://mattermost.com/security-updates/

Frequently Asked Questions

What is the severity of CVE-2019-20844?
CVE-2019-20844 has been classified as a medium severity vulnerability due to its potential for misuse in channel spoofing.
How do I fix CVE-2019-20844?
To fix CVE-2019-20844, update Mattermost Server to version 5.18.0 or later.
What does CVE-2019-20844 affect?
CVE-2019-20844 affects Mattermost Server versions prior to 5.18.0, along with several earlier versions.
Can CVE-2019-20844 lead to data breaches?
Yes, CVE-2019-20844 can potentially lead to data breaches by allowing an attacker to spoof private messaging channels.
Is there a workaround for CVE-2019-20844?
There is no official workaround for CVE-2019-20844; updating to a secure version is the only recommendation.

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vendor/mattermost
canonical/mattermost
version/mattermost/5.15.0
version/mattermost/5.16.0
version/mattermost/5.17.0
version/mattermost/5.18.0-rc1
version/mattermost/5.18.0-rc2
version/mattermost/5.18.0-rc3
version/mattermost/5.18.0-rc4

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