CVE-2025-55070
Unknown Unknown - Not Provided
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
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Meta Information
Published
2025-11-14
Last Modified
2025-11-17
Generated
2026-06-16
AI Q&A
2025-11-14
EPSS Evaluated
2026-06-14
NVD
CVE-2025-55070
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mattermost mattermost_server to 11.0.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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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.

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