Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication
| Reporter | Title | Published | Views | Family All 22 |
|---|---|---|---|---|
 | Mattermost Authentication Bypass | 5 Dec 202500:00 | – | bdu_fstec |
 | CVE-2025-12419 | 27 Nov 202516:43 | – | circl |
 | Mattermost security vulnerabilities | 27 Nov 202500:00 | – | cnnvd |
 | CVE-2025-12419 | 27 Nov 202515:55 | – | cve |
 | CVE-2025-12419 Account takeover on OAuth/OpenID-enabled servers | 27 Nov 202515:55 | – | cvelist |
 | EUVD-2025-199827 | 27 Nov 202518:30 | – | euvd |
 | Mattermost Server 10.5.x <= 10.5.12 / 10.11.x <= 10.11.4 / 10.12.x <= 10.12.1 / 11.0.x <= 11.0.3 Improper Authentication (MMSA-2025-00547) | 10 Dec 202500:00 | – | nessus |
 | CVE-2025-12419 | 27 Nov 202515:55 | – | mend |
 | Vulnerabilities fixed in Mattermost | 28 Nov 202509:53 | – | ncsc |
 | CVE-2025-12419 | 27 Nov 202516:15 | – | nvd |
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17 Dec 2025 00:41Current
7.7High risk
Vulners AI Score7.7
CVSS 3.19.9
EPSS0.00367
SSVC