CVE-2025-55070

HighCVSS 7.5/10Last modified Oct 19, 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

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-306

Affected software

VendorProductVersions
MattermostMattermost>= <11, <= <11

References

Timeline

Published
Nov 14, 2025
Last modified
Oct 19, 2026
NVD status
Analyzed

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