CVE-2025-14350

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate team membership when processing channel mentions which allows authenticated users to determine the existence of teams and their URL names via posting channel shortlinks and observing the channel_mentions property in the API response. Mattermost Advisory ID: MMSA-2025-00563

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://mattermost.com/security-updates	Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::
	cpe:2.3:a:mattermost:mattermost_server::::::::

History

18 Feb 2026, 20:19

Type	Values Removed	Values Added
References	~~() https://mattermost.com/security-updates -~~	() https://mattermost.com/security-updates - Vendor Advisory
CPE		cpe:2.3:a:mattermost:mattermost_server::::::::
First Time		Mattermost Mattermost mattermost Server

18 Feb 2026, 17:52

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 no validan correctamente la membresía del equipo al procesar menciones de canal, lo que permite a usuarios autenticados determinar la existencia de equipos y sus nombres de URL mediante la publicación de enlaces cortos de canal y observando la propiedad channel_mentions en la respuesta de la API. ID de Aviso de Mattermost: MMSA-2025-00563

16 Feb 2026, 13:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-16 13:15

Updated : 2026-02-18 20:19

NVD link : CVE-2025-14350

Mitre link : CVE-2025-14350

CVE.ORG link : CVE-2025-14350

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-862

Missing Authorization

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