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Improper Validation Of OAuth State Tokens

🗓️ 22 Apr 2026 08:43:39Reported by Veracode Vulnerability DatabaseType 
veracode
 veracode🔗 sca.analysiscenter.veracode.com👁 2 Views

Improper validation of OpenID Connect OAuth state tokens in Mattermost can enable account takeover.

Related
Detection
Refs
ReporterTitlePublishedViews
Family
Circl		CVE-2025-12419
27 Nov 202516:43
–circl
CNNVD		Mattermost 安全漏洞
27 Nov 202500:00
–cnnvd
CVE		CVE-2025-12419
27 Nov 202515:55
–cve
Cvelist		CVE-2025-12419 Account takeover on OAuth/OpenID-enabled servers
27 Nov 202515:55
–cvelist
EUVD		EUVD-2025-199827
27 Nov 202518:30
–euvd
Github Security Blog		Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication
27 Nov 202518:30
–github
Tenable Nessus		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
NCSC		Vulnerabilities fixed in Mattermost
28 Nov 202509:53
–ncsc
NVD		CVE-2025-12419
27 Nov 202516:15
–nvd
OSV		GHSA-3X39-62H4-F8J6 Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication
27 Nov 202518:30
–osv
Rows per page
Vulners
Node
mattermostgithub.com/mattermost/mattermost-serverRangev10.12.0-rc1–v10.12.1go
OR
mattermostgithub.com/mattermost/mattermost-serverRangev10.11.0-rc1–v10.11.4go
OR
mattermostgithub.com/mattermost/mattermost-serverRangev10.5.0-rc1–v10.5.12go
OR
mattermostgithub.com/mattermost/mattermost-serverRangev11.0.0–v11.0.3go
OR
mattermostgithub.com/mattermost/mattermost-serverRangev0.5.0–0.5.0go
OR
mattermostgithub.com/mattermost/mattermost-serverMatch10.12.0go
OR
mattermostgithub.com/mattermost/mattermost-serverRange10.11.0–10.11.3go
OR
mattermostgithub.com/mattermost/mattermost-serverRange10.5.0–10.5.11go
OR
mattermostgithub.com/mattermost/mattermost-serverRange11.0.0–11.0.3go
OR
mattermostgithub.com/mattermost/mattermost-serverRange10.12.0–10.12.1go
OR
mattermostgithub.com/mattermost/mattermost-serverRange10.11.0–10.11.4go
OR
mattermostgithub.com/mattermost/mattermost-serverRange10.5.0–10.5.12go
OR
microsoftwindows_server_2008Range8.0.0-20240619142046-8181a9ddffc0–8.0.0-20251015091448-abbf01b9db45go
OR
microsoftwindows_server_2008Range8.0.0-20240619142046-8181a9ddffc0–8.0.0-20251016131338-dad6bd7a1509go

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03 Jun 2026 09:39Current
7.2High risk
Vulners AI Score7.2
CVSS 3.19.9
EPSS0.00086
SSVC
OpenID Connectstate tokensaccount takeoverMattermost servervalidation weakness
2