CVE-2026-22545
Received Received - Intake
Authentication Bypass in Mattermost 10.11.x Allows Password Change

Publication date: 2026-03-16

Last updated on: 2026-03-18

Assigner: Mattermost, Inc.

Description
Mattermost versions 10.11.x <= 10.11.10 fail to validate user's authentication method when processing account auth type switch which allows an authenticated attacker to change account password without confirmation via falsely claiming a different auth provider.. Mattermost Advisory ID: MMSA-2026-00583
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Meta Information
Published
2026-03-16
Last Modified
2026-03-18
Generated
2026-06-16
AI Q&A
2026-03-16
EPSS Evaluated
2026-06-15
NVD
CVE-2026-22545
EUVD
EUVD-2026-12439
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
mattermost mattermost_server From 10.11.0 (inc) to 10.11.11 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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Executive Summary

Mattermost versions 10.11.x up to 10.11.10 have a vulnerability where the system fails to properly validate a user's authentication method during an account authentication type switch.

This flaw allows an authenticated attacker to change the account password without confirmation by falsely claiming to use a different authentication provider.

Impact Analysis

An attacker who is already authenticated can exploit this vulnerability to change the password of an account without needing confirmation.

This could lead to unauthorized account access or account takeover, potentially disrupting user access and compromising account integrity.

Compliance Impact

I don't know

Detection Guidance

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Mitigation Strategies

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