CVE-2025-55070

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CVSS 3.1

7.5 high

EPSS

<1%p22

Published

Nov 14, 2025 (Nov 14, 2025)

Modified

Jun 17, 2026

Description

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

Vendors: mattermost
Products: mattermost server
Weakness: CWE-306
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (0.3%)

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