BaseFortify

Publication date: 2025-11-14

Last updated on: 2025-11-17

Assigner: Mattermost, Inc.

Description

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-11-14

Last Modified

2025-11-17

Generated

2026-07-06

AI Q&A

2025-11-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-55070

Affected Vendors & Products

Vendor	Product	Version / Range
mattermost	mattermost_server	to 11.0.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-306	The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Mattermost versions prior to 11, where the software fails to enforce multi-factor authentication (MFA) on WebSocket connections. This flaw allows unauthenticated users to access sensitive information through WebSocket events.

Impact Analysis

The vulnerability can lead to unauthorized access to sensitive information without proper authentication, potentially exposing confidential data and compromising the security of the affected Mattermost instance.

Hi! I’m here to help you understand CVE-2025-55070. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70