CVE-2025-41395

Webapp DoS via malicious retrospective post in Playbooks

Description

Mattermost versions 10.4.x <= 10.4.2, 10.5.x <= 10.5.0, 9.11.x <= 9.11.10 fail to properly validate the props used by the RetrospectivePost custom post type in the Playbooks plugin, which allows an attacker to create a specially crafted post with maliciously crafted props and cause a denial of service (DoS) of the web app for all users.

Remediation

Solution:

  • Update Mattermost to versions 10.6.0, 10.4.3, 10.5.1, 9.11.11 or higher. Otherwise, update the Playbooks plugin to version 2.1.1 or higher

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
Affected: Mattermost Mattermost
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2025-41395?
CVE-2025-41395 has been scored as a medium severity vulnerability.
How to fix CVE-2025-41395?
To fix CVE-2025-41395: Update Mattermost to versions 10.6.0, 10.4.3, 10.5.1, 9.11.11 or higher. Otherwise, update the Playbooks plugin to version 2.1.1 or higher
Is CVE-2025-41395 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-41395 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-2025-41395?
CVE-2025-41395 affects Mattermost Mattermost.
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