UpHeron
All vulnerabilities

Servers and applications

CVE-2025-8023

Mattermost versions 10.8.x <= 10.8.3, 10.5.x <= 10.5.8, 9.11.x <= 9.11.17, 10.9.x <= 10.9.2 fails to sanitize path traversal sequences in template file destination paths, which allows a system admin to perform path traversal attacks via malicious path components, potentially enabling malicious file placement outside intended directories.

Severity
Medium 4.9
Published
21 Aug 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.11.18, 10.5.9, 10.8.4, 10.9.3
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • From 9.11.0 before 9.11.18
  • From 10.5.0 before 10.5.9
  • From 10.8.0 before 10.8.4
  • From 10.9.0 before 10.9.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-8023
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-8023