CVE-2025-20051: Arbitrary file read via block duplication in Mattermost Boards

Published Feb 24, 2025
·
Updated

Mattermost versions 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to properly validate input when patching and duplicating a board, which allows a user to read any arbitrary file on the system via duplicating a specially crafted block in Boards.

Affected Software

9 affected componentsFixes available
go/github.com/mattermost/mattermost/server/v8>=10.4.0-rc1<10.4.2
10.4.2
go/github.com/mattermost/mattermost/server/v8>=10.3.0-rc1<10.3.3
10.3.3
go/github.com/mattermost/mattermost/server/v8>=10.2.0-rc1<10.2.3
10.2.3
go/github.com/mattermost/mattermost/server/v8>=9.11.0-rc1<9.11.8
9.11.8
go/github.com/mattermost/mattermost/server/v8<8.0.0-20250122165010-4ed702ccff4e
8.0.0-20250122165010-4ed702ccff4e
Mattermost Mattermost Server>=9.11.0<9.11.8
Mattermost Mattermost Server>=10.2.0<10.2.3
Mattermost Mattermost Server>=10.3.0<10.3.3
Mattermost Mattermost Server>=10.4.0<10.4.2

Remediation

Information

Update Mattermost to versions 10.5.0, 10.4.2, 9.11.8, 10.3.3, 10.2.3 or higher. Alternatively, update the Mattermost Boards plugin to v9.0.5 or higher.

Event History

Feb 24, 2025
CVE Published
via MITRE·07:27 AM
Data Sourced
via MITRE·07:27 AM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·08:15 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·08:15 AM
Affected Software
Advisory Published
via GitHub·09:35 AM

Frequently Asked Questions

1

What is the severity of CVE-2025-20051?

CVE-2025-20051 has a medium severity rating due to its potential for unauthorized file access.

2

How do I fix CVE-2025-20051?

To fix CVE-2025-20051, update your Mattermost version to 10.4.2, 10.3.3, 10.2.3, or 9.11.8.

3

What products are affected by CVE-2025-20051?

CVE-2025-20051 affects Mattermost versions 10.4.x through 10.4.1, 9.11.x through 9.11.7, 10.3.x through 10.3.2, and 10.2.x through 10.2.2.

4

What happens if I am vulnerable to CVE-2025-20051?

If you are vulnerable to CVE-2025-20051, an attacker could exploit this issue to read arbitrary files from your system.

5

When was CVE-2025-20051 reported?

CVE-2025-20051 was reported in early 2025.

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