A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As a result, one user may receive tokens that belong to another user.
Metrics
Affected Vendors & Products
References
History
Wed, 29 Oct 2025 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| References |
| |
| Metrics |
threat_severity
|
threat_severity
|
Tue, 28 Oct 2025 14:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Tue, 28 Oct 2025 13:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As a result, one user may receive tokens that belong to another user. | |
| Title | Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline session takeover due to reused authentication session id | |
| First Time appeared |
Redhat
Redhat build Keycloak |
|
| Weaknesses | CWE-384 | |
| CPEs | cpe:/a:redhat:build_keycloak: | |
| Vendors & Products |
Redhat
Redhat build Keycloak |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: redhat
Published: 2025-10-28T13:23:34.634Z
Updated: 2025-10-28T13:45:19.173Z
Reserved: 2025-10-28T13:14:38.975Z
Link: CVE-2025-12390
Updated: 2025-10-28T13:45:10.036Z
Status : Received
Published: 2025-10-28T14:15:57.980
Modified: 2025-10-28T14:15:57.980
Link: CVE-2025-12390