Detections
Analytics

Mattermost Server 10.5.x < 10.5.11 / 10.10.x < 10.10.3 / 10.11.x 10.11.3 / 10.12.0 Missing Authorization (MMSA-2025-00525)

medium Nessus Plugin ID 271809

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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 affected by a vulnerability as referenced in the MMSA-2025-00525 advisory.

 - Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions (CVE-2025-41410)

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 10.5.11, 10.10.3, 10.11.3, 10.12.0 or later.

See Also

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

Plugin Details

Severity: Medium

ID: 271809

File Name: mattermost_server_MMSA-2025-00525.nasl

Version: 1.1

Type: remote

Family: CGI abuses

Published: 10/28/2025

Updated: 10/28/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.3

CVSS v2

Risk Factor: Medium

Base Score: 5.5

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

CVSS Score Source: CVE-2025-41410

CVSS v3

Risk Factor: Medium

Base Score: 5.4

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

Vulnerability Information

CPE: cpe:/a:mattermost:mattermost_server

Required KB Items: installed_sw/Mattermost Server

Patch Publication Date: 10/16/2025

Vulnerability Publication Date: 10/16/2025

Reference Information

CVE: CVE-2025-41410

IAVA: 2025-A-0779