Detections
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Mattermost Server 9.11.x < 9.11.10 / 10.4.x < 10.4.4 / 10.5.x < 10.5.2 / 10.6.0 (MMSA-2025-00452)

medium Nessus Plugin ID 234794

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Synopsis

The remote host is missing a security update.

Description

The version of Mattermost Server installed on the remote host is prior to 9.11.10, 10.4.4, or 10.5.2 / 10.6.0. It is, therefore, affected by a vulnerability as referenced in the MMSA-2025-00452 advisory.

 - Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the Allow Users to View Archived Channels configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived. (CVE-2025-27571)

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 9.11.10 / 10.4.4 / 10.5.2 / 10.6.0 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 234794

File Name: mattermost_server_MMSA-2025-00452.nasl

Version: 1.2

Type: remote

Family: CGI abuses

Published: 4/24/2025

Updated: 4/25/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.9

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

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

CVSS Score Source: CVE-2025-27571

CVSS v3

Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mattermost:mattermost_server

Required KB Items: installed_sw/Mattermost Server

Exploit Ease: No known exploits are available

Patch Publication Date: 3/17/2025

Vulnerability Publication Date: 4/16/2025

Reference Information

CVE: CVE-2025-27571

IAVA: 2025-A-0289