CVE-2023-2831

Denial of Service while unescaping a Markdown string

Description

Mattermost fails to unescape Markdown strings in a memory-efficient way, allowing an attacker to cause a Denial of Service by sending a message containing a large number of escaped characters.

Remediation

Solution:

  • Update Mattermost to version 7.1.10, 7.8.5, 7.9.4, 7.10.1 or higher.

Category

4.3
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.12%
Vendor Advisory mattermost.com
Affected: Mattermost Mattermost
Published at:
Updated at:

References

Link Tags
https://mattermost.com/security-updates/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2023-2831?
CVE-2023-2831 has been scored as a medium severity vulnerability.
How to fix CVE-2023-2831?
To fix CVE-2023-2831: Update Mattermost to version 7.1.10, 7.8.5, 7.9.4, 7.10.1 or higher.
Is CVE-2023-2831 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-2831 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-2831?
CVE-2023-2831 affects Mattermost Mattermost.
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