Description
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.
INFO
Published Date :
2025-11-27T15:55:44.815Z
Last Modified :
2025-11-27T17:18:07.520Z
Source :
Mattermost
AFFECTED PRODUCTS
The following products are affected by CVE-2025-12419 vulnerability.
No data.
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2025-12419.
| URL | Resource |
|---|---|
| https://mattermost.com/security-updates |
|