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CVE

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 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.

MEDIUM · CVSS 4.6 EPSS 0.00838
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-601URL Redirection to Untrusted Site ('Open Redirect')
CWE-601URL Redirection to Untrusted Site ('Open Redirect')
▤

Affected Products & Versions

2
redhat keycloakall versions
redhat single sign-onall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Maven org.keycloak:keycloak-core MODERATE fixed in 23.0.4
▣

Scoring & Timeline

4.6
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD18 Dec 2023 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
⚑

Vendor Advisories

12
rhsaRHSA-2024:0800Moderate
rhsaRHSA-2024:0801Moderate
rhsaRHSA-2024:0094Moderate
rhsaRHSA-2024:0804Moderate
rhsaRHSA-2024:0095Moderate
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2023-6927Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2255027Issue TrackingVendor Advisory
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