Skip to content
OpenAdvisories
High RHSA-2021:5219 1 CVE

Red Hat Security Advisory: Red Hat Single Sign-On security update on RHEL 8

Published Sep 16, 2024 · Updated Aug 5, 2026

Ecosystem: Red Hat

Fixed packages 2

ReleasePackageFixed in
Red Hat · Red Hat Single Sign On 7 red_hat_single_sign_on:7.5::el8 rh-sso7-keycloak 0:15.0.2-3.redhat_00002.1.el8sso
Red Hat · Red Hat Single Sign On 7 red_hat_single_sign_on:7.5::el8 rh-sso7-keycloak-server 0:15.0.2-3.redhat_00002.1.el8sso

Vulnerabilities 1

  • High 8.8
    CVE-2021-4133

    Improper Authorization in Keycloak

    A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.

    org.keycloak:keycloak-services Maven

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • article
    https://access.redhat.com/documentation/en-us/red_hat_single_sign-on/7.5/
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2033602
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2021/rhsa-2021_5219.json
  • report
    https://access.redhat.com/security/cve/CVE-2021-4133
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2021-4133
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2021-4133
  • article
    https://github.com/keycloak/keycloak/issues/9247
  • article
    https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487