CVE-2023-0091 Keycloak has lack of validation of access token on client registrations endpoint
Attackers can access or modify sensitive information by exploiting improper client token revocation checks in Keycloak's credential flow.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-0091?
CVE-2023-0091 is a low-severity missing authorization vulnerability in Redhat Keycloak, published on 11 Jan 2023. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A flaw was found in Keycloak, where it did not properly check client tokens for possible revocation in its client credential flow. This flaw allows an attacker to access or modify potentially sensitive information.
Weakness: CWE-863
Which versions are affected by CVE-2023-0091?
2 open source packages ship an affected version, including org.keycloak:keycloak-core. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.keycloak:keycloak-core Maven | All versions | 20.0.3 |
org.keycloak:keycloak-core Maven | All versions | 20.0.3 |
Products include Redhat Keycloak.
How do I fix CVE-2023-0091?
Upgrade org.keycloak:keycloak-core to 20.0.3 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2023-0091 being exploited?
There is no known exploitation of CVE-2023-0091 in the wild and no public exploit code.
Other vulnerabilities in Redhat Keycloak
- CVE-2022-4361 Keycloak vulnerable to cross-site scripting when validating URI-schemes on SAML and OIDC
- CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature
- CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability
- CVE-2019-14910 Keycloak Authentication Error
- CVE-2019-14909 Keycloak Authentication Error
Sources
Also known as GHSA-v436-q368-hvgg.