CVE-2025-8402 MEDIUM

CVE-2025-8402: Nil pointer dereference in bulk import crashes server

Vendor Mattermost
Product Mattermost
Weakness CWE-1287
Published August 21, 2025
Last update August 21, 2025
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality None
Integrity None

CVSS vector

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

What the vulnerability does

01Description

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to validate import data which allows a system admin to crash the server via the bulk import feature.

Key dates

02Disclosure timeline

August 21, 2025 CVE published
August 21, 2025 Record updated