CVE-2021-20262 Keycloak Missing authentication for critical function

What is CVE-2021-20262?

CVE-2021-20262 is a medium-severity authentication bypass vulnerability in Redhat Keycloak, published on 9 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A flaw was found in Keycloak 12.0.0 where re-authentication does not occur while updating the password. This flaw allows an attacker to take over an account if they can obtain temporary, physical access to a user’s browser. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Weakness: CWE-306

Which versions are affected by CVE-2021-20262?

2 open source packages ship an affected version, including org.keycloak:keycloak-core. It affects 2 products.

Products include Redhat Keycloak, Redhat Single Sign-On.

How do I fix CVE-2021-20262?

No fix has been published for CVE-2021-20262 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2021-20262 being exploited?

There is no known exploitation of CVE-2021-20262 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 Critical 10.0
• CVE-2022-1245 Keycloak vulnerable to privilege escalation on Token Exchange feature Critical 9.8
• CVE-2021-20195 keycloak Self Stored Cross-site Scripting vulnerability Critical 9.6
• CVE-2019-14910 Keycloak Authentication Error Critical 9.3
• CVE-2019-14909 Keycloak Authentication Error Critical 9.3

All Redhat Keycloak vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-xf46-8vvp-4hxx.