Keycloak: redirect_uri validation bypass (CVE-2023-6291)
Published Last modified Sources: CVE.org, OSV
What is affected, what to do
A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts.
Update Red Hat build of Keycloak 22 to version 22.0.7-1, Red Hat build of Keycloak 22 to version 22-6, Red Hat build of Keycloak 22 to version 22-9.
- Affected
- Red Hat build of Keycloak 22
lt *..22.0.7-1 - Red Hat build of Keycloak 22
lt *..22-6 - Red Hat build of Keycloak 22
lt *..22-9 - Red Hat Single Sign-On 7.6 for RHEL 7
lt *..0:18.0.11-2.redhat_00003.1.el7sso - Red Hat Single Sign-On 7.6 for RHEL 7
lt *..0:18.0.12-1.redhat_00001.1.el7sso - Red Hat Single Sign-On 7.6 for RHEL 8
lt *..0:18.0.11-2.redhat_00003.1.el8sso - Red Hat Single Sign-On 7.6 for RHEL 8
lt *..0:18.0.12-1.redhat_00001.1.el8sso - Red Hat Single Sign-On 7.6 for RHEL 9
lt *..0:18.0.11-2.redhat_00003.1.el9sso - Red Hat Single Sign-On 7.6 for RHEL 9
lt *..0:18.0.12-1.redhat_00001.1.el9sso - Red Hat RHEL-8 based Middleware Containers
lt *..7.6-38 - Red Hat RHEL-8 based Middleware Containers
lt *..7.6.6-2 - Red Hat RHEL-8 based Middleware Containers
lt *..7.6-41
- Red Hat build of Keycloak 22
- Fixed in
- Red Hat build of Keycloak 22
22.0.7-1 - Red Hat build of Keycloak 22
22-6 - Red Hat build of Keycloak 22
22-9 - Red Hat Single Sign-On 7.6 for RHEL 7
0:18.0.11-2.redhat_00003.1.el7sso - Red Hat Single Sign-On 7.6 for RHEL 7
0:18.0.12-1.redhat_00001.1.el7sso - Red Hat Single Sign-On 7.6 for RHEL 8
0:18.0.11-2.redhat_00003.1.el8sso - Red Hat Single Sign-On 7.6 for RHEL 8
0:18.0.12-1.redhat_00001.1.el8sso - Red Hat Single Sign-On 7.6 for RHEL 9
0:18.0.11-2.redhat_00003.1.el9sso - Red Hat Single Sign-On 7.6 for RHEL 9
0:18.0.12-1.redhat_00001.1.el9sso - Red Hat RHEL-8 based Middleware Containers
7.6-38 - Red Hat RHEL-8 based Middleware Containers
7.6.6-2 - Red Hat RHEL-8 based Middleware Containers
7.6-41
- Red Hat build of Keycloak 22
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Metrics
7.1
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
7.1
CVSS v3
Severity High on the scale from 0 to 10.
Source: CVE.org, OSV
1.0 %
EPSS score
Low — model estimates < 1% exploitation likelihood.
Source: FIRST EPSS, percentile 61.1
Show all metrics
- Severity
- High
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 69.69 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 7.1 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 7.1
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 1.0 %
- Low — model estimates < 1% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 61.1
- High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-601
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.
Source: cvelistv5, NVD (NIST), OSV (Open Source Vulnerabilities)
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| Red Hat | Migration Toolkit for Applications 6 |
|
|
| Red Hat | Migration Toolkit for Applications 7 |
|
|
| Red Hat | OpenShift Serverless |
|
|
| Red Hat | Red Hat build of Keycloak 22 |
|
|
| Red Hat | Red Hat build of Keycloak 22.0.7 |
|
|
| Red Hat | Red Hat Data Grid 8 |
|
|
| Red Hat | Red Hat Decision Manager 7 |
|
|
| Red Hat | Red Hat Fuse 7 |
|
|
| Red Hat | Red Hat JBoss Data Grid 7 |
|
|
| Red Hat | Red Hat JBoss Enterprise Application Platform 6 |
|
|
| Red Hat | Red Hat Process Automation 7 |
|
|
| Red Hat | Red Hat Single Sign-On 7 |
|
|
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 7 |
|
|
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 8 |
|
|
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 9 |
|
|
| Red Hat | RHEL-8 based Middleware Containers |
|
|
| Red Hat | Single Sign-On 7.6.6 |
|
|
| redhat | keycloak |
|
|
| redhat | migration_toolkit_for_applications |
|
|
| redhat | openshift_container_platform |
|
|
| redhat | openshift_container_platform_for_ibm_z |
|
|
| redhat | openshift_container_platform_for_linuxone |
|
|
| redhat | openshift_container_platform_for_power |
|
|
| redhat | single_sign-on |
|
|
Vendors and products
- Red Hat Migration Toolkit For Applications 6
- Red Hat Migration Toolkit For Applications 7
- Red Hat Openshift Serverless
- Red Hat Red Hat Build Of Keycloak 22
- Red Hat Red Hat Data Grid 8
- Red Hat Red Hat Decision Manager 7
- Red Hat Red Hat Fuse 7
- Red Hat Red Hat Jboss Data Grid 7
- Red Hat Red Hat Jboss Enterprise Application Platform 6
- Red Hat Red Hat Process Automation 7
- Red Hat Red Hat Single Sign-on 7
- Red Hat Red Hat Single Sign-on 7.6 For Rhel 7
Weakness classes (CWE)
CWE-601URL Redirection to Untrusted Site ('Open Redirect')
Base
The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
Entry at MITRE CWE-601
References & sources
- github.comkeycloak/keycloak/security/advisories/GHSA-mpwq-j3xf-7m5wweb
- NVD (NIST)vuln/detail/CVE-2023-6291advisory
- github.comkeycloak/keycloak/commit/b2e91105315ccf2c1df549b4f6c5948322cbfd…web
- access.redhat.comRHSA-2023:7854web, Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2023:7855web, Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2023:7856web, Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2023:7857web, Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2023:7858web, Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2023:7860web, Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2023:7861web, Vendor advisory, x_refsource_REDHAT
- access.redhat.comsecurity/cve/CVE-2023-6291web, Vulnerability database, x_refsource_REDHAT
- bugzilla.redhat.comRHBZ#2251407web, Issue tracking, x_refsource_REDHAT
- github.comkeycloak/keycloakpackage
- access.redhat.comRHSA-2024:0798Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2024:0799Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2024:0800Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2024:0801Vendor advisory, x_refsource_REDHAT
- access.redhat.comRHSA-2024:0804Vendor advisory, x_refsource_REDHAT
Changes to this CVE
Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).
Record modifiedCVE Program
Show 37 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://access.redhat.com/errata/RHSA-2023:7854Reference added —https://access.redhat.com/errata/RHSA-2023:7855Reference added —https://access.redhat.com/errata/RHSA-2023:7856Reference added —https://access.redhat.com/errata/RHSA-2023:7857Reference added —https://access.redhat.com/errata/RHSA-2023:7858Reference added —https://access.redhat.com/errata/RHSA-2023:7860Reference added —https://access.redhat.com/errata/RHSA-2023:7861Reference added —https://access.redhat.com/errata/RHSA-2024:0798Reference added —https://access.redhat.com/errata/RHSA-2024:0799Reference added —https://access.redhat.com/errata/RHSA-2024:0800Reference added —https://access.redhat.com/errata/RHSA-2024:0801Reference added —https://access.redhat.com/errata/RHSA-2024:0804Reference added —https://access.redhat.com/security/cve/CVE-2023-6291Reference added —https://bugzilla.redhat.com/show_bug.cgi?id=2251407Reference removed https://access.redhat.com/errata/RHSA-2023:7854—Reference removed https://access.redhat.com/errata/RHSA-2023:7855—Reference removed https://access.redhat.com/errata/RHSA-2023:7856—Reference removed https://access.redhat.com/errata/RHSA-2023:7857—Reference removed https://access.redhat.com/errata/RHSA-2023:7858—Reference removed https://access.redhat.com/errata/RHSA-2023:7860—Reference removed https://access.redhat.com/errata/RHSA-2023:7861—Reference removed https://access.redhat.com/errata/RHSA-2024:0798—Reference removed https://access.redhat.com/errata/RHSA-2024:0799—Reference removed https://access.redhat.com/errata/RHSA-2024:0800—Reference removed https://access.redhat.com/errata/RHSA-2024:0801—Reference removed https://access.redhat.com/errata/RHSA-2024:0804—Reference removed https://access.redhat.com/security/cve/CVE-2023-6291—Reference removed https://bugzilla.redhat.com/show_bug.cgi?id=2251407—Reference type removed https://access.redhat.com/errata/RHSA-2023:7854 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7855 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7856 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7857 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7858 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7860 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7861 Types: Vendor Advisory—Reference type removed https://access.redhat.com/security/cve/CVE-2023-6291 Types: Vendor Advisory—Reference type removed https://bugzilla.redhat.com/show_bug.cgi?id=2251407 Types: Issue Tracking, Vendor Advisory—Source identifier: af854a3a-2127-422b-91ae-364da2661108
Record modifiedRed Hat
Show 38 original changes
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2023/6xxx/CVE-2023-6291.json">CVE-2023-6291</a>Reference added —https://access.redhat.com/errata/RHSA-2023:7854Reference added —https://access.redhat.com/errata/RHSA-2023:7855Reference added —https://access.redhat.com/errata/RHSA-2023:7856Reference added —https://access.redhat.com/errata/RHSA-2023:7857Reference added —https://access.redhat.com/errata/RHSA-2023:7858Reference added —https://access.redhat.com/errata/RHSA-2023:7860Reference added —https://access.redhat.com/errata/RHSA-2023:7861Reference added —https://access.redhat.com/errata/RHSA-2024:0798Reference added —https://access.redhat.com/errata/RHSA-2024:0799Reference added —https://access.redhat.com/errata/RHSA-2024:0800Reference added —https://access.redhat.com/errata/RHSA-2024:0801Reference added —https://access.redhat.com/errata/RHSA-2024:0804Reference added —https://access.redhat.com/security/cve/CVE-2023-6291Reference added —https://bugzilla.redhat.com/show_bug.cgi?id=2251407Reference removed https://access.redhat.com/errata/RHSA-2023:7854—Reference removed https://access.redhat.com/errata/RHSA-2023:7855—Reference removed https://access.redhat.com/errata/RHSA-2023:7856—Reference removed https://access.redhat.com/errata/RHSA-2023:7857—Reference removed https://access.redhat.com/errata/RHSA-2023:7858—Reference removed https://access.redhat.com/errata/RHSA-2023:7860—Reference removed https://access.redhat.com/errata/RHSA-2023:7861—Reference removed https://access.redhat.com/errata/RHSA-2024:0798—Reference removed https://access.redhat.com/errata/RHSA-2024:0799—Reference removed https://access.redhat.com/errata/RHSA-2024:0800—Reference removed https://access.redhat.com/errata/RHSA-2024:0801—Reference removed https://access.redhat.com/errata/RHSA-2024:0804—Reference removed https://access.redhat.com/security/cve/CVE-2023-6291—Reference removed https://bugzilla.redhat.com/show_bug.cgi?id=2251407—Reference type removed https://access.redhat.com/errata/RHSA-2023:7854 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7855 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7856 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7857 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7858 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7860 Types: Vendor Advisory—Reference type removed https://access.redhat.com/errata/RHSA-2023:7861 Types: Vendor Advisory—Reference type removed https://access.redhat.com/security/cve/CVE-2023-6291 Types: Vendor Advisory—Reference type removed https://bugzilla.redhat.com/show_bug.cgi?id=2251407 Types: Issue Tracking, Vendor Advisory—Source identifier: secalert@redhat.com
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<a href="https://intel.neosec.eu/en/cve/CVE-2023-6291"><img src="https://intel.neosec.eu/badge/cve/CVE-2023-6291.svg?lang=en" alt="CVE-2023-6291 – NEOSEC Intel" height="20"></a>