Mattermost Server 9.11.x < 9.11.17 / 10.5.x < 10.5.8 (MMSA-2025-00474)

low Nessus Plugin ID 242671

Synopsis

The remote host is missing a security update.

Description

The version of Mattermost Server installed on the remote host is affected by a vulnerability as referenced in the MMSA-2025-00474 advisory.

- Mattermost versions 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to negotiate a new token when accepting the invite which allows a user that intercepts both invite and password to send synchronization payloads to the server that originally created the invite via the REST API. (CVE-2025-6227)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Mattermost Server version 9.11.17 / 10.5.8 / 10.9.0 or later.

See Also

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

Plugin Details

Severity: Low

ID: 242671

File Name: mattermost_server_MMSA-2025-00474.nasl

Version: 1.2

Type: remote

Family: CGI abuses

Published: 7/24/2025

Updated: 7/25/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.9

CVSS v2

Risk Factor: Low

Base Score: 1.7

Vector: CVSS2#AV:N/AC:H/Au:M/C:N/I:P/A:N

CVSS Score Source: CVE-2025-6227

CVSS v3

Risk Factor: Low

Base Score: 2.2

Vector: CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:L/A:N

Vulnerability Information

CPE: cpe:/a:mattermost:mattermost_server

Required KB Items: installed_sw/Mattermost Server

Patch Publication Date: 6/18/2025

Vulnerability Publication Date: 7/18/2025

Reference Information

CVE: CVE-2025-6227

IAVA: 2025-A-0538