CVE-2025-41443

Mattermost versions 10.5.x <= 10.5.12, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when accessing channel information which allows guest users to discover active public channels and their metadata via the `/api/v4/teams/{team_id}/channels/ids` endpoint

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::::::::

History

19 Oct 2026, 16:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost 10.5.x menor o igual que 10.5.12, 10.11.x menor o igual que 10.11.2 no validan correctamente los permisos de los usuarios invitados al acceder a la información del canal, lo que permite a los usuarios invitados descubrir canales públicos activos y sus metadatos a través del endpoint '/API/v4/teams/{team_id}/channels/ids'

Information

Published : 2025-10-16 08:15

Updated : 2026-10-19 16:10

NVD link : CVE-2025-41443

Mitre link : CVE-2025-41443

CVE.ORG link : CVE-2025-41443

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-862

Missing Authorization

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