CVE-2023-6927

Keycloak: open redirect via "form_post.jwt" jarm response mode

MEDIUM
6.1
CVSS Score
Published: December 18, 2023 at 10:59 PM UTC
Updated: September 22, 2026 at 04:17 AM UTC
2 products affected across 2 vendorsSingle Sign onKeycloak

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Severity
MEDIUM6.1
Exploit prediction
EPSS 1%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
Vendor states this is fixed in 0:18.0.11-3.redhat_00001.1.el7sso (unaffected)
Vendor states this is fixed in 0:18.0.11-3.redhat_00001.1.el8sso (unaffected)
Vendor states this is fixed in 0:18.0.11-3.redhat_00001.1.el9sso (unaffected)
Vendor states this is fixed in 0:18.0.12-1.redhat_00001.1.el7sso (unaffected)
Vendor states this is fixed in 0:18.0.12-1.redhat_00001.1.el8sso (unaffected)
Vendor states this is fixed in 0:18.0.12-1.redhat_00001.1.el9sso (unaffected)
Vendor states this is fixed in 7.6 (unaffected)
Vendor states this is fixed in 7.6.6 (unaffected)

References (14)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-601

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