UpHeron
All vulnerabilities

Servers and applications

CVE-2025-27933

Mattermost versions 10.4.x <= 10.4.2, 10.3.x <= 10.3.3, 9.11.x <= 9.11.8 fail to fail to enforce channel conversion restrictions, which allows members with permission to convert public channels to private ones to also convert private ones to public

Severity
Medium 4.3
Published
21 Mar 2025
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
9.11.9, 10.3.4, 10.4.3
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • From 9.11.0 before 9.11.9
  • From 10.3.0 before 10.3.4
  • From 10.4.0 before 10.4.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-27933
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-27933