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CVE-2023-6134

Keycloak: reflected xss via wildcard in oidc redirect_uri

4.6 MediumFix available

A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
Low
Availability
None

Exploit likelihood

1.32%Up 1.3 points since Dec 15, 2023
90%50%10%1%

What each source reports

CVE List Score used 4.6

Keycloak: reflected xss via wildcard in oidc redirect_uri

A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.

Record
CVE-2023-6134
CVSS 3.1
4.6 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
EUVDEUVD-2023-3189 4.6

A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.

Record
EUVD-2023-3189
CVSS 3.1
4.6 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Updated
2026-11-02
GitHub AdvisoriesGHSA-cvg2-7c3j-g36j 4.6

Keycloak vulnerable to reflected XSS via wildcard in OIDC redirect_uri

Keycloak prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This could permit an attacker to submit a specially crafted request leading to XSS or possibly further attacks.

Record
GHSA-cvg2-7c3j-g36j
CVSS 3.1
4.6 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Weakness
CWE-75
Updated
2026-11-02
NVD 4.6

A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.

Record
CVE-2023-6134
CVSS 3.1
4.6 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
CVSS 3.1
5.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSV 4.6

Keycloak: reflected xss via wildcard in oidc redirect_uri

A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.

Record
CVE-2023-6134
CVSS 3.1
4.6 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Weakness
CWE-79
Updated
2026-11-02
OSVGHSA-cvg2-7c3j-g36j 4.6

Keycloak vulnerable to reflected XSS via wildcard in OIDC redirect_uri

Keycloak prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This could permit an attacker to submit a specially crafted request leading to XSS or possibly further attacks.

Record
GHSA-cvg2-7c3j-g36j
CVSS 3.1
4.6 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Weakness
CWE-75
Updated
2026-11-02
Show 6 moreShow less
OSVRHSA-2023:7854 7.7

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.6 security update on RHEL 7

Record
RHSA-2023:7854
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2023:7855 7.7

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.6 security update on RHEL 9

Record
RHSA-2023:7855
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2023:7856 7.7

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.6 security update on RHEL 8

Record
RHSA-2023:7856
CVSS 3.1
7.7 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
Updated
2026-11-02
OSVRHSA-2024:0798 7.1

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.7 security update on RHEL 7

Record
RHSA-2024:0798
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Updated
2026-11-02
OSVRHSA-2024:0799 7.1

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.7 security update on RHEL 8

Record
RHSA-2024:0799
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Updated
2026-11-02
OSVRHSA-2024:0800 7.1

Red Hat Security Advisory: Red Hat Single Sign-On 7.6.7 security update on RHEL 9

Record
RHSA-2024:0800
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Updated
2026-11-02

Affected products

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Affected packages

Affected packages
PackageAffectedFixed
org.keycloak:keycloak-services
Maven
 before 23.0.3
23.0.3
org.keycloak:keycloak-services
Maven
 before 23.0.3, plus listed versions
1.0-alpha-11.0-alpha-1-120620131.0-alpha-21.0-alpha-31.0-alpha-4
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1.0-beta-11.0-beta-1-201505211.0-beta-1-201505231.0-beta-21.0-beta-31.0-beta-41.0-final1.0-rc-11.0-rc-21.0.1.Final1.0.2.Final1.0.3.Final1.0.4.Final1.0.5.Final1.1.0.Beta11.1.0.Beta21.1.0.Final1.1.1.Final1.2.0.Beta11.2.0.CR11.2.0.Final1.3.0.Final1.3.1.Final1.4.0.Final1.5.0-Final1.5.0.Final1.5.1.Final1.6.0.Final1.6.1.Final1.7.0.CR11.7.0.Final1.8.0.Alpha11.8.0.CR11.8.0.CR21.8.0.CR31.8.0.Final1.8.1.Final1.9.0.CR11.9.0.Final1.9.1.Final1.9.2.Final1.9.3.Final1.9.4.Final1.9.5.Final1.9.7.Final
23.0.3
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el7
From an advisory covering 3 CVEs
 before 0:18.0.11-2.redhat_00003.1.el7sso
0:18.0.11-2.redhat_00003.1.el7sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el7
From an advisory covering 3 CVEs
 before 0:18.0.11-2.redhat_00003.1.el7sso
0:18.0.11-2.redhat_00003.1.el7sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el9
From an advisory covering 3 CVEs
 before 0:18.0.11-2.redhat_00003.1.el9sso
0:18.0.11-2.redhat_00003.1.el9sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el9
From an advisory covering 3 CVEs
 before 0:18.0.11-2.redhat_00003.1.el9sso
0:18.0.11-2.redhat_00003.1.el9sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el8
From an advisory covering 3 CVEs
 before 0:18.0.11-2.redhat_00003.1.el8sso
0:18.0.11-2.redhat_00003.1.el8sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el8
From an advisory covering 3 CVEs
 before 0:18.0.11-2.redhat_00003.1.el8sso
0:18.0.11-2.redhat_00003.1.el8sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el7
From an advisory covering 8 CVEs
 before 0:18.0.12-1.redhat_00001.1.el7sso
0:18.0.12-1.redhat_00001.1.el7sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el7
From an advisory covering 8 CVEs
 before 0:18.0.12-1.redhat_00001.1.el7sso
0:18.0.12-1.redhat_00001.1.el7sso
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Affected packages
PackageAffectedFixed
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el8
From an advisory covering 8 CVEs
 before 0:18.0.12-1.redhat_00001.1.el8sso
0:18.0.12-1.redhat_00001.1.el8sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el8
From an advisory covering 8 CVEs
 before 0:18.0.12-1.redhat_00001.1.el8sso
0:18.0.12-1.redhat_00001.1.el8sso
rh-sso7-keycloak
Red Hat:red_hat_single_sign_on:7.6::el9
From an advisory covering 8 CVEs
 before 0:18.0.12-1.redhat_00001.1.el9sso
0:18.0.12-1.redhat_00001.1.el9sso
rh-sso7-keycloak-server
Red Hat:red_hat_single_sign_on:7.6::el9
From an advisory covering 8 CVEs
 before 0:18.0.12-1.redhat_00001.1.el9sso
0:18.0.12-1.redhat_00001.1.el9sso

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-6134 is a medium vulnerability (CVSS 4.6) in Redhat Keycloak, published December 14, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.32%, the 70th percentile. Fixed in org.keycloak:keycloak-services 23.0.3.

References

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Left out here: 113 versions. The JSON record has them.

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