Description
A flaw was found in Keycloak before 13.0.0 where an external identity provider, after successful authentication, redirects to a Keycloak endpoint that accepts multiple invocations with the use of the same "state" parameter. This flaw allows a malicious user to perform replay attacks.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | keycloak | keycloak 13.0.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Single Sign On 7 | rh-sso7-keycloak +1 | 9.0.12-1.redhat_00001.1.el6sso | RHSA-2021:0969, RHSA-2021:0968, RHSA-2021:0967 |
Advisories 3
- RHSA-2021:0969 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.6 security update on RHEL 8 Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2021:0967 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.6 security update on RHEL 6 Red Hat Security Advisories (RHSA) · Oct 13, 2026
- RHSA-2021:0968 Red Hat Security Advisory: Red Hat Single Sign-On 7.4.6 security update on RHEL 7 Red Hat Security Advisories (RHSA) · Oct 13, 2026