CVE-2025-25279

Arbitrary file read in Mattermost Boards via import & export board archive

Description

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 board blocks when importing boards which allows an attacker could read any arbitrary file on the system via importing and exporting a specially crafted import archive in Boards.

Remediation

Solution:

  • 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.

Category

9.9
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 11.53% Top 10%
Affected: Mattermost Mattermost
Published at:
Updated at:

References

Link Tags
https://mattermost.com/security-updates

Frequently Asked Questions

What is the severity of CVE-2025-25279?
CVE-2025-25279 has been scored as a critical severity vulnerability.
How to fix CVE-2025-25279?
To fix CVE-2025-25279: 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.
Is CVE-2025-25279 being actively exploited in the wild?
It is possible that CVE-2025-25279 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~12% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-25279?
CVE-2025-25279 affects Mattermost Mattermost.
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