Path Traversal Vulnerability in Mattermost Affecting Multiple Versions
CVE-2025-6465

4.3MEDIUM

Key Information:

Vendor

Mattermost
Status
Mattermost
Vendor
CVE Published:
21 August 2025

What is CVE-2025-6465?

A critical vulnerability exists in certain versions of Mattermost that fails to properly sanitize file names during the upload process. This allows users with the appropriate file upload permissions to exploit this weakness, leading to potential overwriting of file attachment thumbnails via path traversal through file streaming APIs. Users are urged to review the affected versions and take necessary actions to mitigate risk.

Affected Version(s)

Mattermost 10.8.0 <= 10.8.3

Mattermost 10.5.0 <= 10.5.8

Mattermost 10.10.0

References

https://mattermost.com/security-updates

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

daw10
.
CVE-2025-6465 : Path Traversal Vulnerability in Mattermost Affecting Multiple Versions