CVE-2025-20051

Name: CVE-2025-20051
Creator: NVD / NIST
Published: 2025-02-24T08:15:10.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2025-20051 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

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 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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.57%

42.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-22

Affected Software

Vendor	Product	Versions
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

References

https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Feb 24, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-20051?

How severe is CVE-2025-20051?

CVE-2025-20051 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2025-20051?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-20051?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST