What is the severity of CVE-2019-20877?

CVE-2019-20877 is considered to have a medium severity level as it allows attackers to infer sensitive information about user 2FA status.

How do I fix CVE-2019-20877?

To fix CVE-2019-20877, upgrade Mattermost Server to version 5.9.0 or later, or to the respective patched version in the affected release range.

What versions of Mattermost Server are affected by CVE-2019-20877?

CVE-2019-20877 affects Mattermost Server versions before 5.9.0, 5.8.1, 5.7.3, and 4.10.8.

Can I safely use Mattermost Server versions below 5.9.0 with CVE-2019-20877?

No, it is recommended to avoid using affected versions of Mattermost Server due to the vulnerability associated with CVE-2019-20877.

Is CVE-2019-20877 publicly known?

Yes, CVE-2019-20877 is a publicly disclosed vulnerability, making it critical for users to update their Mattermost Server installations.

Vulnerability/
CVE-2019-20877

medium

5.3

19/6/2020

5/8/2024

CVE-2019-20877

First published: Fri Jun 19 2020(Updated: )

An issue was discovered in Mattermost Server before 5.9.0, 5.8.1, 5.7.3, and 4.10.8. It allows attackers to obtain sensitive information about whether someone has 2FA enabled.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Mattermost	<4.10.8
Mattermost	>=5.7.0<5.7.3
Mattermost	>=5.8.0<5.8.1
Mattermost	=5.9.0-rc1
Mattermost	=5.9.0-rc2
Mattermost	=5.9.0-rc3
Mattermost	=5.9.0-rc4

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Reference Links

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

Frequently Asked Questions

What is the severity of CVE-2019-20877?
CVE-2019-20877 is considered to have a medium severity level as it allows attackers to infer sensitive information about user 2FA status.
How do I fix CVE-2019-20877?
To fix CVE-2019-20877, upgrade Mattermost Server to version 5.9.0 or later, or to the respective patched version in the affected release range.
What versions of Mattermost Server are affected by CVE-2019-20877?
CVE-2019-20877 affects Mattermost Server versions before 5.9.0, 5.8.1, 5.7.3, and 4.10.8.
Can I safely use Mattermost Server versions below 5.9.0 with CVE-2019-20877?
No, it is recommended to avoid using affected versions of Mattermost Server due to the vulnerability associated with CVE-2019-20877.
Is CVE-2019-20877 publicly known?
Yes, CVE-2019-20877 is a publicly disclosed vulnerability, making it critical for users to update their Mattermost Server installations.

agent/type
collector/mitre-cve
source/MITRE
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vendor/mattermost
canonical/mattermost
version/mattermost/5.7.0
version/mattermost/5.8.0
version/mattermost/5.9.0-rc1
version/mattermost/5.9.0-rc2
version/mattermost/5.9.0-rc3
version/mattermost/5.9.0-rc4

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