What is the severity of CVE-2018-21252?

CVE-2018-21252 is considered a medium severity vulnerability.

How do I fix CVE-2018-21252?

To fix CVE-2018-21252, upgrade Mattermost Server to version 5.2 or higher, or to one of the specified patched versions.

What impact does CVE-2018-21252 have on Mattermost Server?

CVE-2018-21252 allows attackers to bypass domain-based signup policies by using multiple email addresses.

Which versions of Mattermost Server are affected by CVE-2018-21252?

CVE-2018-21252 affects Mattermost Server versions prior to 5.2, 5.1.1, 5.0.3, and 4.10.3.

Is there a risk of unauthorized access due to CVE-2018-21252?

Yes, CVE-2018-21252 could lead to unauthorized account creation, increasing the risk of unauthorized access.

Vulnerability/
CVE-2018-21252

medium

4.3

CWE

732

19/6/2020

5/8/2024

CVE-2018-21252

First published: Fri Jun 19 2020(Updated: )

An issue was discovered in Mattermost Server before 5.2, 5.1.1, 5.0.3, and 4.10.3. Attackers could use multiple e-mail addresses to bypass a domain-based policy for signups.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Mattermost	<4.10.3
Mattermost	>=5.0.0<5.0.3
Mattermost	>=5.1.0<5.1.1
Mattermost	=5.2.0-rc1
Mattermost	=5.2.0-rc2
Mattermost	=5.2.0-rc3
Mattermost	=5.2.0-rc4
Mattermost	=5.2.0-rc5
Mattermost	=5.2.0-rc6

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Reference Links

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

Frequently Asked Questions

What is the severity of CVE-2018-21252?
CVE-2018-21252 is considered a medium severity vulnerability.
How do I fix CVE-2018-21252?
To fix CVE-2018-21252, upgrade Mattermost Server to version 5.2 or higher, or to one of the specified patched versions.
What impact does CVE-2018-21252 have on Mattermost Server?
CVE-2018-21252 allows attackers to bypass domain-based signup policies by using multiple email addresses.
Which versions of Mattermost Server are affected by CVE-2018-21252?
CVE-2018-21252 affects Mattermost Server versions prior to 5.2, 5.1.1, 5.0.3, and 4.10.3.
Is there a risk of unauthorized access due to CVE-2018-21252?
Yes, CVE-2018-21252 could lead to unauthorized account creation, increasing the risk of unauthorized access.

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vendor/mattermost
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version/mattermost/5.0.0
version/mattermost/5.1.0
version/mattermost/5.2.0-rc1
version/mattermost/5.2.0-rc2
version/mattermost/5.2.0-rc3
version/mattermost/5.2.0-rc4
version/mattermost/5.2.0-rc5
version/mattermost/5.2.0-rc6

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