CVE-2025-4981

Name: CVE-2025-4981
Creator: NVD / NIST
Published: 2025-06-20T11:15:20.993+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.9/10EPSS 0.69%

Last modified Jun 17, 2026

CVE-2025-4981 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to sanitize filenames in the archive extractor which allows authenticated users to write files to arbitrary locations on the filesystem via uploading archives with path traversal sequences in filenames, potentially leading to remote code execution. The vulnerability impacts instances where file uploads and document search by content is enabled (FileSettings.EnableFileAttachments = true and FileSettings.ExtractContent = true). EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to sanitize filenames in the archive extractor which allows authenticated users to write files to arbitrary locations on the filesystem via uploading archives with path traversal sequences in filenames, potentially leading to remote code execution. The vulnerability impacts instances where file uploads and document search by content is enabled (FileSettings.EnableFileAttachments = true and FileSettings.ExtractContent = true). These configuration settings are enabled by default.

Metrics

CVSS 3.1

9.9/10

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

EPSS Probability

0.69%

48.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-427

Affected Software

Vendor	Product	Versions
Mattermost	Mattermost Server	>= 9.11.0, < 9.11.16
Mattermost	Mattermost Server	>= 10.5.0, < 10.5.6
Mattermost	Mattermost Server	>= 10.6.0, < 10.6.6
Mattermost	Mattermost Server	>= 10.7.0, < 10.7.3
Mattermost	Mattermost Server	10.8.0

References

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

Timeline

Published: Jun 20, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-4981?

How severe is CVE-2025-4981?

CVE-2025-4981 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.

How do I fix CVE-2025-4981?

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-2025-4981?

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

Scan your code now

Source: NVD / NIST