UpHeron
All vulnerabilities

Servers and applications

CVE-2025-12419

Mattermost versions 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12, 11.0.x <= 11.0.3 fail to properly validate OAuth state tokens during OpenID Connect authentication which allows an authenticated attacker with team creation privileges to take over a user account via manipulation of authentication data during the OAuth completion flow. This requires email verification to be disabled…

Severity
Critical 9.9
Published
27 Nov 2025
Last changed
19 Oct 2026
Added to UpHeron
1 Nov 2026
Fixed in
10.5.13, 10.11.5, 10.12.2, 11.0.4
Sources
NVD

Affected software

SoftwareAffected versions
MattermostServers and applications · cpe:a:mattermost:mattermost_server
  • From 10.5.0 before 10.5.13
  • From 10.11.0 before 10.11.5
  • From 10.12.0 before 10.12.2
  • From 11.0.0 before 11.0.4

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-12419
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12419