CVE-2025-27538: MFA Enforcement Bypass Allows Unauthorized Removal of MFA for Other Users

Published Apr 16, 2025
·
Updated

Mattermost versions 10.5.x <= 10.5.1, 9.11.x <= 9.11.9 fail to enforce MFA checks in PUT /api/v4/users/user-id/mfa when the requesting user differs from the target user ID, which allows users with editotherusers permission to activate or deactivate MFA for other users, even if those users have not set up MFA.

Affected Software

6 affected componentsFixes available
Mattermost Mattermost<=10.5.1, <=9.11.9
go/github.com/mattermost/mattermost/server/v8<8.0.0-20250314142426-c049748b8863
8.0.0-20250314142426-c049748b8863
go/github.com/mattermost/mattermost/server/v8>=9.11.0<9.11.10
9.11.10
go/github.com/mattermost/mattermost/server/v8>=10.5.0<10.5.2
10.5.2
Mattermost Mattermost Server>=9.11.0<9.11.10
Mattermost Mattermost Server>=10.5.0<10.5.2

Remediation

Information

Update Mattermost to versions 10.6.0, 10.5.2, 9.11.10 or higher.

Event History

Apr 16, 2025
CVE Published
via MITRE·07:45 AM
Data Sourced
via MITRE·07:45 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:15 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·08:15 AM
Affected Software
Advisory Published
via GitHub·09:32 AM
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Frequently Asked Questions

1

What is the severity of CVE-2025-27538?

CVE-2025-27538 is considered a high severity vulnerability due to its potential impact on user data security.

2

How do I fix CVE-2025-27538?

To remediate CVE-2025-27538, you should upgrade Mattermost to version 10.5.2 or 9.11.10 or later.

3

What are the risks associated with CVE-2025-27538?

CVE-2025-27538 allows users with edit_other_users permissions to change multi-factor authentication settings for other users, leading to potential unauthorized access.

4

Which Mattermost versions are impacted by CVE-2025-27538?

CVE-2025-27538 affects Mattermost versions 10.5.0 to 10.5.1 and 9.11.0 to 9.11.9.

5

Who is affected by CVE-2025-27538?

Any user with edit_other_users permissions in the affected versions of Mattermost is at risk due to CVE-2025-27538.

Company

Resources

Contact

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