CVE-2025-41395

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of service disruption.

Exploit odds

0.5% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2025-04-24 07:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 09:22 UTC Last updatedMost recent change to the record

Details

Published

2025-04-24 07:15 UTC

Last modified

2026-06-17 09:22 UTC

Exploit probability

0.5% · EPSS, next 30 days

Weakness

CWE-1287

Record status

Analyzed

Affected

• Mattermost Server < 9.11.11
• Mattermost Server < 10.4.3
• Mattermost Server < 10.5.1

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High