Get real-time updates on Telegram
CVE-2025-55070: mattermost server before 11.0.0 (exclusive); +1 more affected products
CVE-2025-55070. CVSS 3.1 base score 7.5 (HIGH, NVD). EPSS 0.00315 (percentile 0.22815), scored 17-Oct-2026.
Affected technology
mattermost server · before 11.0.0 (exclusive)
mattermost
Mattermost · <11 through <11
Mattermost
Description’s affected range: versions <11 fail to enforce multi-factor authentication on WebSocket connections which
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required
Attack conditions (NVD, CVSS 3.1): Network (remote) · No privileges required · No user interaction required
What an attacker can do
Unauthenticated users can access sensitive information via WebSocket events. Vendor/CNA’s CVSS 3.1 assessment (base score 6.5/10) rates confidentiality impact as high; integrity and availability impact as none. NVD’s CVSS 3.1 assessment (base score 7.5/10) rates confidentiality impact as high; integrity and availability impact as none.
- CWE
- CWE-306
- CCR priority
- 30.1 /100 (P4)
- CVSS 3.1
- 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N · NVD
- EPSS
- 0.00315 · percentile 0.22815 · 2026-10-17
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-19 14:02:10.907757+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2025-55070.html