UpHeron
All vulnerabilities

Servers and applications

CVE-2025-10545

Mattermost versions 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to properly validate guest user permissions when adding channel members which allows guest users to add any team members to their private channels via the `/api/v4/channels/{channel_id}/members` endpoint

Severity
Medium 4.3
Published
16 Oct 2025
Last changed
19 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
10.5.11, 10.11.3
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • From 10.5.0 before 10.5.11
  • From 10.11.0 before 10.11.3

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-10545
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-10545