Detections
Analytics

Mattermost Server 10.5.x < 10.5.10 / 10.9.x < 10.9.5 / 10.10.x < 10.10.2 / 10.11.0 URL Redirection (MMSA-2025-00509)

high Nessus Plugin ID 266220

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-2025-00509 advisory.

 - Mattermost versions 10.10.x <= 10.10.1, 10.5.x <= 10.5.9, 10.9.x <= 10.9.4 fail to validate the redirect_to parameter, allowing an attacker to craft a malicious link that, once a user authenticates with their SAML provider, could post the user’s cookies to an attacker-controlled URL. (CVE-2025-9072)

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 10.5.10 / 10.9.5 / 10.10.2 / 10.11.0 or later.

See Also

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

Plugin Details

Severity: High

ID: 266220

File Name: mattermost_server_MMSA-2025-00509.nasl

Version: 1.1

Type: remote

Family: CGI abuses

Published: 9/30/2025

Updated: 9/30/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: High

Base Score: 8.7

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

CVSS Score Source: CVE-2025-9072

CVSS v3

Risk Factor: High

Base Score: 7.6

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

Vulnerability Information

CPE: cpe:/a:mattermost:mattermost_server

Required KB Items: installed_sw/Mattermost Server

Patch Publication Date: 9/15/2025

Vulnerability Publication Date: 9/15/2025

Reference Information

CVE: CVE-2025-9072

IAVA: 2025-A-0695