CVE-2026-22545
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
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mattermost | mattermost_server | From 10.11.0 (inc) to 10.11.11 (exc) |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know