CVE-2023-5196

DoS via Channel Notification Properties

Description

Mattermost fails to enforce character limits in all possible notification props allowing an attacker to send a really long value for a notification_prop resulting in the server consuming an abnormal quantity of computing resources and possibly becoming temporarily unavailable for its users.

Remediation

Solution:

  • Update Mattermost Server to versions 7.8.10, 8.0.2, 8.1.1 or higher.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.17%
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-2023-5196?
CVE-2023-5196 has been scored as a medium severity vulnerability.
How to fix CVE-2023-5196?
To fix CVE-2023-5196: Update Mattermost Server to versions 7.8.10, 8.0.2, 8.1.1 or higher.
Is CVE-2023-5196 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-5196 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-2023-5196?
CVE-2023-5196 affects Mattermost Mattermost.
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