CVE-2025-3446: Members Without Guest Invite Permissions Can Add Guests to Teams

Published May 15, 2025
·
Updated

Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.

Affected Software

10 affected componentsFixes available
Mattermost Mattermost<=10.6.1, <=10.5.2, <=10.4.4, <=9.11.11
go/github.com/mattermost/mattermost/server/v8<8.0.0-20250415054241-76ab3867b785
8.0.0-20250415054241-76ab3867b785
go/github.com/mattermost/mattermost/server/v8>=9.11.0<=9.11.11
9.11.12
go/github.com/mattermost/mattermost/server/v8>=10.4.0<=10.4.4
10.4.5
go/github.com/mattermost/mattermost/server/v8>=10.5.0<=10.5.2
10.5.3
go/github.com/mattermost/mattermost/server/v8>=10.6.0<=10.6.1
10.6.2
Mattermost Mattermost Server>=9.11.0<9.11.12
Mattermost Mattermost Server>=10.4.0<10.4.5
Mattermost Mattermost Server>=10.5.0<10.5.3
Mattermost Mattermost Server>=10.6.0<10.6.2

Remediation

Information

Update Mattermost to versions 10.7.0, 10.6.2, 10.5.3, 10.4.5, 9.11.12 or higher.

Event History

May 15, 2025
CVE Published
via MITRE·10:43 AM
Data Sourced
via MITRE·10:43 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·11:15 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·11:15 AM
Affected Software
Advisory Published
via GitHub·12:30 PM
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Frequently Asked Questions

1

What is the severity of CVE-2025-3446?

CVE-2025-3446 is classified as a medium severity vulnerability due to its potential to allow unauthorized access to guest user permissions.

2

How do I fix CVE-2025-3446?

To fix CVE-2025-3446, upgrade Mattermost to versions 10.6.2 or higher, 10.5.3 or higher, 10.4.5 or higher, or 9.11.12 or higher.

3

What versions of Mattermost are affected by CVE-2025-3446?

CVE-2025-3446 affects Mattermost versions 10.6.x through 10.6.1, 10.5.x through 10.5.2, 10.4.x through 10.4.4, and 9.11.x through 9.11.11.

4

What type of permissions are improperly managed in CVE-2025-3446?

CVE-2025-3446 improperly manages permissions related to inviting guest users within the API by authenticated users.

5

Who is at risk from CVE-2025-3446?

Authenticated users with limited permissions to invite non-guest users could exploit CVE-2025-3446 to add guest users without adequate authorization.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203