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CVE

CVE-2025-12419

Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication
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CVE

CVE-2025-12419

Mattermost fails to properly validate OAuth state tokens during OpenID Connect authentication

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 (default: disabled), OAuth/OpenID Connect to be enabled, and the attacker to control two users in the SSO system with one of them never having logged into Mattermost.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.9
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
C
H
U
9.9
-
3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2025-12419, https://github.com/mattermost/mattermost/pull/34296, https://github.com/mattermost/mattermost/commit/15364790cc277cfaa372693d2d5442b87f70fd42, https://github.com/mattermost/mattermost/commit/364c2203de00fe0d8424b6b46d6f0eeb02a2539a, https://github.com/mattermost/mattermost/commit/46b5c436bb3093cc1da3fa2455f93d4c52389eee, https://github.com/mattermost/mattermost/commit/c3f4818afe46a7084740e809708ae22641c76d8d, https://github.com/mattermost/mattermost/commit/d3ed703dc8330684952eb8d49a375bac6ea7b0c6, https://github.com/advisories/GHSA-3x39-62h4-f8j6, https://github.com/mattermost/mattermost, https://mattermost.com/security-updates

Severity

9.9

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
9.9
EPSS Probability
0.00065%
EPSS Percentile
0.2042%
Introduced Version
0,10.12.0,v8.0.0,v10.6.0-rc1,v10.12.0-rc1,v11.0.0-alpha.1,v11.1.0-rc1,v8.0.0-20230611052435-efaa6264cc9a,v8.0.0-20230418053528-b200a078819e,v6.0.0-20230322212227-c943ed6859b1,v6.0.0,v6.0.0-20210722065147-c4b4e1bc38eb,v5.18.0-rc.test,v5.0.0-20191128133938-2259b7f2a8b9,v4.3.0-rc1+incompatible,v0.0.0-20170906221254-1adfd0e9be69,v3.9.0+incompatible,v0.0.0-20170410121949-dfc6db737411,v3.0.0+incompatible,v0.0.0-20160422053701-2e5617c29be6
Fix Available
8.0.0-20251028000919-d3ed703dc833,10.12.2,v10.5.13,v10.11.5,v10.12.2,v11.0.4,v11.1.0-rc2,v8.0.0-20251028000919-d3ed703dc833

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