UpHeron
All vulnerabilities

Servers and applications

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 with file upload permission to overwrite file attachment thumbnails via path traversal in file streaming APIs.

Severity
Medium 4.3
Published
21 Aug 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
10.5.9, 10.8.4, 10.9.4
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • From 10.5.0 before 10.5.9
  • From 10.8.0 before 10.8.4
  • From 10.9.0 before 10.9.4
  • Version 10.10.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-6465
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-6465