| Package | Affected versions | Patched versions |
|---|---|---|
| github.com/mattermost/mattermost-server | ≥ 10.11.0, < 10.11.5≥ 10.12.0, < 10.12.2≥ 10.5.0, < 10.5.13≥ 11.0.0, < 11.0.3all versions | 10.11.510.12.210.5.1311.0.3 |
| github.com/mattermost/mattermost-server/v5 | all versions | |
| github.com/mattermost/mattermost-server/v6 | all versions | |
| github.com/mattermost/mattermost/server/v8 | < 8.0.0-20251022210333-acda1fb5dd46 | 8.0.0-20251022210333-acda1fb5dd46 |
| mattermost server | ≥ 10.11.0, < 10.11.5≥ 10.12.0, < 10.12.2≥ 10.5.0, < 10.5.13≥ 11.0.0, < 11.0.3 | 10.11.510.12.210.5.1311.0.3 |
Mattermost versions 11.0.x <= 11.0.2, 10.12.x <= 10.12.1, 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to to verify that the token used during the code exchange originates from the same authentication flow, which allows an authenticated user to perform account takeover via a specially crafted email address used when switching authentication methods and sending a request to the /users/login/sso/code-exchange endpoint. The vulnerability requires ExperimentalEnableAuthenticationTransfer to be enabled (default: enabled) and RequireEmailVerification to be disabled (default: disabled).
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