CVE-2024-36255

Published: May 26, 2024Modified: Jun 17, 2026

5.7

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N

Exploitability: 2.1 / Impact: 3.6

Source: responsibledisclosure@mattermost.com (Secondary)

Description

Mattermost versions 9.5.x <= 9.5.3, 9.6.x <= 9.6.1 and 8.1.x <= 8.1.12 fail to perform proper input validation on post actions which allows an attacker to run a playbook checklist task command as another user via creating and sharing a deceptive post action that unexpectedly runs a slash command in some arbitrary channel.

Affected (3)

Products: Mattermost: Mattermost Server

1 product

Mattermost Server

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Mattermost Mattermost Server	From 8.1.0 to 8.1.13
Mattermost Mattermost Server	From 9.5.0 to 9.5.4
Mattermost Mattermost Server	From 9.6.0 to 9.6.2

Related CWEs

Cross-Site Request Forgery (CSRF)

The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.

References (2)

https://mattermost.com/security-updates

Source: responsibledisclosure@mattermost.com

Vendor Advisory

https://mattermost.com/security-updates

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

Timeline

No history available yet.