CVE-2025-55070

high

Description

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

References

https://mattermost.com/security-updates

https://euvd.enisa.europa.eu/vulnerability/EUVD-2025-186556

Details

Source: Mitre, NVD

Published: 2025-11-14

Updated: 2026-10-19

Risk Information

CVSS v2

Base Score: 7.8

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

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N