CVE-2025-55070

Mattermost versions <11 fail to enforce multi-factor authentication on WebSocket connections which allows unauthenticated users to access sensitive information via WebSocket events

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

History

19 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) Las versiones de Mattermost anteriores a la 11 no logran aplicar la autenticación multifactor en las conexiones WebSocket, lo que permite a usuarios no autenticados acceder a información sensible a través de eventos WebSocket.

Information

Published : 2025-11-14 08:15

Updated : 2026-10-19 13:10

NVD link : CVE-2025-55070

Mitre link : CVE-2025-55070

CVE.ORG link : CVE-2025-55070

JSON object : View

Products Affected

mattermost

mattermost_server

CWE

CWE-306

Missing Authentication for Critical Function

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