UpHeron
All vulnerabilities

Servers and applications

CVE-2025-49222

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, 10.10.x <= 10.10.0 fail to validate upload types in remote cluster upload sessions which allows a system admin to upload non-attachment file types via shared channels that could potentially be placed in arbitrary filesystem directories.

Severity
Medium 6.8
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
  • Version 10.10.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-49222
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-49222