What is the severity of CVE-2017-18871?

CVE-2017-18871 has been classified as a high-severity vulnerability due to its potential to cause application crashes.

How do I fix CVE-2017-18871?

To fix CVE-2017-18871, update Mattermost Server to version 4.5.0 or later.

What versions of Mattermost Server are affected by CVE-2017-18871?

CVE-2017-18871 affects Mattermost Server versions prior to 4.5.0, including 4.4.4, 4.3.3, and earlier versions.

Can CVE-2017-18871 lead to data theft?

No, CVE-2017-18871 is a denial of service vulnerability that causes application crashes, not data theft.

How does CVE-2017-18871 exploit vulnerabilities in Mattermost Server?

CVE-2017-18871 allows attackers to exploit the application by causing it to crash through the improper handling of an @ character before a JavaScript field name.

Vulnerability/
CVE-2017-18871

high

7.5

19/6/2020

5/8/2024

CVE-2017-18871

First published: Fri Jun 19 2020(Updated: )

An issue was discovered in Mattermost Server before 4.5.0, 4.4.5, 4.3.4, and 4.2.2. It allows attackers to cause a denial of service (application crash) via an @ character before a JavaScript field name.

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Mattermost	<4.2.2
Mattermost	>=4.3.0<4.3.4
Mattermost	>=4.4.0<4.4.5
Mattermost	=4.5.0-rc1
Mattermost	=4.5.0-rc2
Mattermost	=4.5.0-rc3
Mattermost	=4.5.0-rc4

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Reference Links

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

Frequently Asked Questions

What is the severity of CVE-2017-18871?
CVE-2017-18871 has been classified as a high-severity vulnerability due to its potential to cause application crashes.
How do I fix CVE-2017-18871?
To fix CVE-2017-18871, update Mattermost Server to version 4.5.0 or later.
What versions of Mattermost Server are affected by CVE-2017-18871?
CVE-2017-18871 affects Mattermost Server versions prior to 4.5.0, including 4.4.4, 4.3.3, and earlier versions.
Can CVE-2017-18871 lead to data theft?
No, CVE-2017-18871 is a denial of service vulnerability that causes application crashes, not data theft.
How does CVE-2017-18871 exploit vulnerabilities in Mattermost Server?
CVE-2017-18871 allows attackers to exploit the application by causing it to crash through the improper handling of an @ character before a JavaScript field name.

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version/mattermost/4.5.0-rc2
version/mattermost/4.5.0-rc3
version/mattermost/4.5.0-rc4

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