CVE-2025-11794: Password hash and MFA secret returned in user email verification endpoint

Published Nov 14, 2025
·
Updated

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11, 10.12.x <= 10.12.0 fail to sanitize user data which allows system administrators to access password hashes and MFA secrets via the POST /api/v4/users/{userid}/email/verify/member endpoint

Affected Software

8 affected componentsFixes available
Mattermost Mattermost<=10.11.3, <=10.5.11, <=10.12.0
go/github.com/mattermost/mattermost/server/v8<8.0.0-20250929212932-a41db04d2746
8.0.0-20250929212932-a41db04d2746
go/github.com/mattermost/mattermost-server>=10.12.0<10.12.1
10.12.1
go/github.com/mattermost/mattermost-server>=10.5.0<10.5.12
10.5.12
go/github.com/mattermost/mattermost-server>=10.11.0<10.11.4
10.11.4
Mattermost Mattermost Server>=10.5.0<10.5.12
Mattermost Mattermost Server>=10.11.0<10.11.4
Mattermost Mattermost Server>=10.12.0<10.12.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade go/github.com/mattermost/mattermost/server/v8 to a version that resolves this vulnerability.

    Fixed in 8.0.0-20250929212932-a41db04d2746
  2. Upgrade

    Upgrade go/github.com/mattermost/mattermost-server to a version that resolves this vulnerability.

    Fixed in 10.12.1
  3. Upgrade

    Upgrade go/github.com/mattermost/mattermost-server to a version that resolves this vulnerability.

    Fixed in 10.5.12
  4. Upgrade

    Upgrade go/github.com/mattermost/mattermost-server to a version that resolves this vulnerability.

    Fixed in 10.11.4
  5. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 11.0.0
  6. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 10.11.4
  7. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 10.5.12
  8. Upgrade

    Upgrade Mattermost to a version that resolves this vulnerability.

    Fixed in 10.12.1

Event History

Nov 14, 2025
CVE Published
via MITRE·10:45 AM
Data Sourced
via MITRE·10:45 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·11:15 AM
DescriptionSeverityWeaknessAffected Software
Advisory Published
via GitHub·12:30 PM
Data Sourced
via GitHub·12:30 PM
DescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2025-11794?

CVE-2025-11794 is classified as a critical vulnerability due to the potential exposure of sensitive user data.

2

How do I fix CVE-2025-11794?

To fix CVE-2025-11794, you should update Mattermost to the latest version that addresses this vulnerability.

3

What versions are affected by CVE-2025-11794?

CVE-2025-11794 affects Mattermost versions 10.11.x up to 10.11.3, 10.5.x up to 10.5.11, and 10.12.x up to 10.12.0.

4

What data can be accessed due to CVE-2025-11794?

Due to CVE-2025-11794, system administrators can access sensitive data such as password hashes and multi-factor authentication secrets.

5

Is CVE-2025-11794 being actively exploited?

As of now, there are no public reports of active exploitation of CVE-2025-11794, but it is considered highly critical.

Company

Resources

Contact

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