Mattermost Server 9.11.x < 9.11.17 / 10.5.x < 10.5.7 / 10.7.x < 10.7.4 / 10.8.x < 10.8.2 (MMSA-2025-00494)

medium Nessus Plugin ID 242669

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-2025-00494 advisory.

- Mattermost versions 10.8.x <= 10.8.1, 10.7.x <= 10.7.3, 10.5.x <= 10.5.7, 9.11.x <= 9.11.16 fail to sanitize input paths of file attachments in the bulk import JSONL file, which allows a system admin to read arbitrary system files via path traversal. (CVE-2025-6233)

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 / 10.7.4 / 10.8.2 / 10.9.0 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 242669

File Name: mattermost_server_MMSA-2025-00494.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: Medium

Score: 5.2

CVSS v2

Risk Factor: Medium

Base Score: 6.1

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

CVSS Score Source: CVE-2025-6233

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/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-2025-6233

IAVA: 2025-A-0538