CVE-2023-6927: medium-severity vulnerability in Red Hat build of Keycloak 22
Keycloak: open redirect via "form_post.jwt" jarm response mode
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 4.6epss 1.1%
A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Affected products
Red Hat · Red Hat build of Keycloak 22Red Hat · Red Hat build of Keycloak 22.0.8Red Hat · Red Hat Single Sign-On 7Red Hat · Red Hat Single Sign-On 7.6 for RHEL 7Red Hat · Red Hat Single Sign-On 7.6 for RHEL 8Red Hat · Red Hat Single Sign-On 7.6 for RHEL 9Red Hat · RHEL-8 based Middleware ContainersRed Hat · Single Sign-On 7.6.6Related CVEs — Red Hat build of Keycloak 22
In the same product, most dangerous first.
CVE-2026-18963CRITICALKeycloak-services: keycloak-services: unauthenticated account takeover via reset-credentials flow bypassEPSS 4.7%CVE-2023-5685HIGHXnio: stackoverflowexception when the chain of notifier states becomes problematically bigEPSS 3.5%CVE-2024-3656HIGHKeycloak: unguarded admin rest api endpoints allows low privilege users to use administrative functionalitiesEPSS 3.3%CVE-2024-5971HIGHUndertow: response write hangs in case of java 17 tlsv1.3 newsessionticketEPSS 2.9%CVE-2026-76166MEDIUMModcluster-core: mod_cluster advertise listener: unauthenticated dos via crafted multicast datagramEPSS 2.7%CVE-2024-7885HIGHUndertow: improper state management in proxy protocol parsing causes information leakageEPSS 2.6%
References
https://access.redhat.com/errata/RHSA-2024:0094https://access.redhat.com/errata/RHSA-2024:0095https://access.redhat.com/errata/RHSA-2024:0096https://access.redhat.com/errata/RHSA-2024:0097https://access.redhat.com/errata/RHSA-2024:0098https://access.redhat.com/errata/RHSA-2024:0100https://access.redhat.com/errata/RHSA-2024:0101https://access.redhat.com/errata/RHSA-2024:0798https://access.redhat.com/errata/RHSA-2024:0799https://access.redhat.com/errata/RHSA-2024:0800https://access.redhat.com/errata/RHSA-2024:0801https://access.redhat.com/errata/RHSA-2024:0804