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EUVD-2026-373358

fkie_cve-2023-6927

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.

GHSA-9vm7-v8wj-3fqw — keycloak-core: open redirect via "form_post.jwt" JARM response mode

Affected: Maven: org.keycloak:keycloak-core

An incomplete fix was found in Keycloak Core patch. An attacker can steal authorization codes or tokens from clients using a wildcard in the JARM response mode "form_post.jwt". It is observed that changing the response_mode parameter in the original proof of concept from "form_post" to "form_post.jwt" can bypass the security patch implemented to address CVE-2023-6134.

gsd-2023-6927

RHSA-2024:0094 — Red Hat Security Advisory: Red Hat Single Sign-On 7.6.6 security update on RHEL 7

keycloak: LDAP injection on username input keycloak: open redirect via "form_post.jwt" JARM response mode

WID-SEC-W-2023-3173 — Keycloak: Schwachstelle ermöglicht Cross-Site Scripting

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Keycloak ausnutzen, um einen Cross-Site Scripting Angriff durchzuführen.