CVE-2025-20051

Arbitrary file read via block duplication in Mattermost Boards

CVSS 9.9 CRITICALEPSS 0.6%CWE-22

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.9EPSS 0.6%KEV nãoPoC —Patch —

Lifecycle

24 Feb 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

Mattermost · Mattermost

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://mattermost.com/security-updates