CVE-2023-2422
Keycloak vulnerable to Improper Client Certificate Validation for OAuth/OpenID clients
7.1
HIGH
CVSS 3.1
EPSS 0.32%
Description
When a Keycloak server is configured to support mTLS authentication for OAuth/OpenID clients, it does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client and therefore access data that belongs to other clients.
How to fix CVE-2023-2422
To remediate CVE-2023-2422, upgrade the affected package to a fixed version below.
- —upgrade to 21.1.2 or later
Is CVE-2023-2422 being exploited?
Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 21.1.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |