Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.
Advisories
Source ID Title
EUVD EUVD EUVD-2025-0091 Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.
Github GHSA Github GHSA GHSA-5m7j-6gc4-ff5g Mattermost fails to properly validate post props
Fixes

Solution

Update Mattermost to versions 10.3.0, 2.23.0, 10.2.1, 9.11.6, 10.0.4, 10.1.4 or higher.


Workaround

No workaround given by the vendor.

References
History

Tue, 30 Sep 2025 16:00:00 +0000

Type Values Removed Values Added
First Time appeared Mattermost mattermost Server
CPEs cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*
cpe:2.3:a:mattermost:mattermost_server:10.2.0:-:*:*:*:*:*:*
Vendors & Products Mattermost mattermost Server

Wed, 12 Feb 2025 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 15 Jan 2025 17:00:00 +0000

Type Values Removed Values Added
Description Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly validate post props which allows a malicious authenticated user to cause a crash via a malicious post.
Title Insufficient Input Validation on Post Props
Weaknesses CWE-1287
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Mattermost

Published:

Updated: 2025-02-12T20:31:20.302Z

Reserved: 2025-01-14T00:19:35.055Z

Link: CVE-2025-20086

cve-icon Vulnrichment

Updated: 2025-02-12T20:25:53.058Z

cve-icon NVD

Status : Analyzed

Published: 2025-01-15T17:15:19.107

Modified: 2025-09-30T15:51:23.113

Link: CVE-2025-20086

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2025-07-12T15:26:24Z