GitHub Advisoryadvisory · Go

GHSA-pj6f-rc94-gw53 Mattermost Fails to Sanitize File Names

MEDIUM Published 2025-08-21 Modified 2025-08-29 Official page ↗
Aliases
CVE-2025-6465
Ecosystem
Go
Packages
github.com/mattermost/mattermost-server, github.com/mattermost/mattermost/server/v8
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Weaknesses
CWE-22
Reviewed
2025-08-22

Affected packages

• Go github.com/mattermost/mattermost-server: >= 10.8.0, < 10.8.4 → fixed in 10.8.4 • Go github.com/mattermost/mattermost-server: >= 10.5.0, < 10.5.9 → fixed in 10.5.9 • Go github.com/mattermost/mattermost-server: >= 10.9.0, < 10.9.4 → fixed in 10.9.4 • Go github.com/mattermost/mattermost-server: >= 10.10.0, < 10.10.1 → fixed in 10.10.1 • Go github.com/mattermost/mattermost/server/v8: < 8.0.0-20250708173752-d6b35c41f0ae5 → fixed in 8.0.0-20250708173752-d6b35c41f0ae5

Description

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to sanitize file names which allows users with file upload permission to overwrite file attachment thumbnails via path traversal in file streaming APIs.

Related

Alias · CVE (1)

  • CVE-2025-6465 Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 10.10.x <= 10.10.0, 10.9.x <= 10.9.3 fail to sanitize file names which allows users… vulnerability

Weakness · CWE (1)

  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory weakness

References