CVE-2023-6544 (GCVE-0-2023-6544)
Vulnerability from cvelistv5 – Published: 2024-04-25 15:58 – Updated: 2025-11-11 15:57
VLAI
EPSS
VEX
Title
Keycloak: authorization bypass
Summary
A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-25 19:19 UTC
CWE
- CWE-625 - Permissive Regular Expression
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:1860 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:1861 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:1862 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:1864 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:1866 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:1867 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:1868 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2023-6544 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2253116 | issue-trackingx_refsource_REDHAT |
Impacted products
10 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
|
Affected:
22.0.0 , < 22.0.10
(semver)
Affected: 23.0.0 , < 24.0.3 (semver) |
||||
| Red Hat | Red Hat build of Keycloak 22 |
Unaffected:
22.0.10-1 , < *
(rpm)
cpe:/a:redhat:build_keycloak:22::el9 |
||
| Red Hat | Red Hat build of Keycloak 22 |
Unaffected:
22-13 , < *
(rpm)
cpe:/a:redhat:build_keycloak:22::el9 |
||
| Red Hat | Red Hat build of Keycloak 22 |
Unaffected:
22-16 , < *
(rpm)
cpe:/a:redhat:build_keycloak:22::el9 |
||
| Red Hat | Red Hat build of Keycloak 22.0.10 |
cpe:/a:redhat:build_keycloak:22
|
||
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 7 |
Unaffected:
0:18.0.13-1.redhat_00001.1.el7sso , < *
(rpm)
cpe:/a:redhat:red_hat_single_sign_on:7.6::el7 |
||
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 8 |
Unaffected:
0:18.0.13-1.redhat_00001.1.el8sso , < *
(rpm)
cpe:/a:redhat:red_hat_single_sign_on:7.6::el8 |
||
| Red Hat | Red Hat Single Sign-On 7.6 for RHEL 9 |
Unaffected:
0:18.0.13-1.redhat_00001.1.el9sso , < *
(rpm)
cpe:/a:redhat:red_hat_single_sign_on:7.6::el9 |
||
| Red Hat | RHEL-8 based Middleware Containers |
Unaffected:
7.6-46 , < *
(rpm)
cpe:/a:redhat:rhosemc:1.0::el8 |
||
| Red Hat | RHSSO 7.6.8 |
cpe:/a:redhat:red_hat_single_sign_on:7.6
|
Date Public
2024-04-16 00:00
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-6544",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-04-25T19:19:09.097776Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-06-04T17:17:10.747Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2024-08-02T08:35:14.454Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "RHSA-2024:1860",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"name": "RHSA-2024:1861",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"name": "RHSA-2024:1862",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"name": "RHSA-2024:1864",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"name": "RHSA-2024:1866",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"name": "RHSA-2024:1867",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"name": "RHSA-2024:1868",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"name": "RHBZ#2253116",
"tags": [
"issue-tracking",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com/keycloak/keycloak",
"defaultStatus": "unaffected",
"packageName": "org.keycloak:keycloak-services",
"versions": [
{
"lessThan": "22.0.10",
"status": "affected",
"version": "22.0.0",
"versionType": "semver"
},
{
"lessThan": "24.0.3",
"status": "affected",
"version": "23.0.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-operator-bundle",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22.0.10-1",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-rhel9",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22-13",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-rhel9-operator",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22-16",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22"
],
"defaultStatus": "unaffected",
"packageName": "keycloak-core",
"product": "Red Hat build of Keycloak 22.0.10",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el7"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el7sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el8"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 8",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el8sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el9"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el9sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:rhosemc:1.0::el8"
],
"defaultStatus": "affected",
"packageName": "rh-sso-7/sso76-openshift-rhel8",
"product": "RHEL-8 based Middleware Containers",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "7.6-46",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6"
],
"defaultStatus": "unaffected",
"packageName": "rh-sso7-keycloak",
"product": "RHSSO 7.6.8",
"vendor": "Red Hat"
}
],
"credits": [
{
"lang": "en",
"value": "Red Hat would like to thank Bastian Kanbach (Secure Systems DE [bastian.kanbach@securesystems.de]) for reporting this issue."
}
],
"datePublic": "2024-04-16T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Moderate"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-625",
"description": "Permissive Regular Expression",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-11-11T15:57:26.470Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"name": "RHSA-2024:1860",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"name": "RHSA-2024:1861",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"name": "RHSA-2024:1862",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"name": "RHSA-2024:1864",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"name": "RHSA-2024:1866",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"name": "RHSA-2024:1867",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"name": "RHSA-2024:1868",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"name": "RHBZ#2253116",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
}
],
"timeline": [
{
"lang": "en",
"time": "2023-12-06T00:00:00.000Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2024-04-16T00:00:00.000Z",
"value": "Made public."
}
],
"title": "Keycloak: authorization bypass",
"workarounds": [
{
"lang": "en",
"value": "No mitigation is currently available for this flaw."
}
],
"x_redhatCweChain": "CWE-625: Permissive Regular Expression"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2023-6544",
"datePublished": "2024-04-25T15:58:47.204Z",
"dateReserved": "2023-12-06T05:42:36.249Z",
"dateUpdated": "2025-11-11T15:57:26.470Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2023-6544",
"date": "2026-09-19",
"epss": "0.01075",
"percentile": "0.6348"
},
"fkie_nvd": {
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized."
},
{
"lang": "es",
"value": "Se encontr\u00f3 una falla en el paquete Keycloak. Este problema se produce debido a una expresi\u00f3n regular permisiva codificada para el filtrado que permite a los hosts registrar un cliente din\u00e1mico. Un usuario malintencionado con suficiente informaci\u00f3n sobre el entorno podr\u00eda poner en peligro un entorno con este registro din\u00e1mico de cliente espec\u00edfico y esta configuraci\u00f3n de TrustedDomain previamente no autorizada."
}
],
"id": "CVE-2023-6544",
"lastModified": "2024-11-21T08:44:03.880",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.5,
"source": "secalert@redhat.com",
"type": "Secondary"
}
]
},
"published": "2024-04-25T16:15:10.097",
"references": [
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"source": "secalert@redhat.com",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-625"
}
],
"source": "secalert@redhat.com",
"type": "Secondary"
}
]
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"collectionURL": "https://github.com/keycloak/keycloak",
"defaultStatus": "unaffected",
"packageName": "org.keycloak:keycloak-services",
"versions": [
{
"lessThan": "22.0.10",
"status": "affected",
"version": "22.0.0",
"versionType": "semver"
},
{
"lessThan": "24.0.3",
"status": "affected",
"version": "23.0.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-operator-bundle",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22.0.10-1",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-rhel9",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22-13",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-rhel9-operator",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22-16",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22"
],
"defaultStatus": "unaffected",
"packageName": "keycloak-core",
"product": "Red Hat build of Keycloak 22.0.10",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el7"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el7sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el8"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 8",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el8sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el9"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el9sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:rhosemc:1.0::el8"
],
"defaultStatus": "affected",
"packageName": "rh-sso-7/sso76-openshift-rhel8",
"product": "RHEL-8 based Middleware Containers",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "7.6-46",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6"
],
"defaultStatus": "unaffected",
"packageName": "rh-sso7-keycloak",
"product": "RHSSO 7.6.8",
"vendor": "Red Hat"
}
],
"source": "secalert@redhat.com"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized."
},
{
"lang": "es",
"value": "Se encontr\u00f3 una falla en el paquete Keycloak. Este problema se produce debido a una expresi\u00f3n regular permisiva codificada para el filtrado que permite a los hosts registrar un cliente din\u00e1mico. Un usuario malintencionado con suficiente informaci\u00f3n sobre el entorno podr\u00eda poner en peligro un entorno con este registro din\u00e1mico de cliente espec\u00edfico y esta configuraci\u00f3n de TrustedDomain previamente no autorizada."
}
],
"id": "CVE-2023-6544",
"lastModified": "2026-06-17T06:50:57.267",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 2.5,
"source": "secalert@redhat.com",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2023-6544",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-04-25T19:19:09.097776Z",
"version": "2.0.3"
}
}
]
},
"published": "2024-04-25T16:15:10.097",
"references": [
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"source": "secalert@redhat.com",
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"source": "secalert@redhat.com",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
}
],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-625"
}
],
"source": "secalert@redhat.com",
"type": "Secondary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-04T07:17:28+00:00",
"cve": "CVE-2023-6544",
"id": "CVE-2023-6544",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:fixed": "21",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "keycloak: Authorization Bypass",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-6544.json",
"version": "3"
},
"vulnrichment": {
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-02T08:35:14.454Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"name": "RHSA-2024:1860",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"name": "RHSA-2024:1861",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"name": "RHSA-2024:1862",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"name": "RHSA-2024:1864",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"name": "RHSA-2024:1866",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"name": "RHSA-2024:1867",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"name": "RHSA-2024:1868",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"name": "RHBZ#2253116",
"tags": [
"issue-tracking",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
}
],
"title": "CVE Program Container"
},
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2023-6544",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2024-04-25T19:19:09.097776Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2024-04-25T19:19:15.886Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://github.com/keycloak/keycloak",
"defaultStatus": "unaffected",
"packageName": "org.keycloak:keycloak-services",
"versions": [
{
"lessThan": "22.0.10",
"status": "affected",
"version": "22.0.0",
"versionType": "semver"
},
{
"lessThan": "24.0.3",
"status": "affected",
"version": "23.0.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-operator-bundle",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22.0.10-1",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-rhel9",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22-13",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22::el9"
],
"defaultStatus": "affected",
"packageName": "rhbk/keycloak-rhel9-operator",
"product": "Red Hat build of Keycloak 22",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "22-16",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:build_keycloak:22"
],
"defaultStatus": "unaffected",
"packageName": "keycloak-core",
"product": "Red Hat build of Keycloak 22.0.10",
"vendor": "Red Hat"
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el7"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 7",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el7sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el8"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 8",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el8sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6::el9"
],
"defaultStatus": "affected",
"packageName": "rh-sso7-keycloak",
"product": "Red Hat Single Sign-On 7.6 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:18.0.13-1.redhat_00001.1.el9sso",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:rhosemc:1.0::el8"
],
"defaultStatus": "affected",
"packageName": "rh-sso-7/sso76-openshift-rhel8",
"product": "RHEL-8 based Middleware Containers",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "7.6-46",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:red_hat_single_sign_on:7.6"
],
"defaultStatus": "unaffected",
"packageName": "rh-sso7-keycloak",
"product": "RHSSO 7.6.8",
"vendor": "Red Hat"
}
],
"credits": [
{
"lang": "en",
"value": "Red Hat would like to thank Bastian Kanbach (Secure Systems DE [bastian.kanbach@securesystems.de]) for reporting this issue."
}
],
"datePublic": "2024-04-16T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized."
}
],
"metrics": [
{
"other": {
"content": {
"namespace": "https://access.redhat.com/security/updates/classification/",
"value": "Moderate"
},
"type": "Red Hat severity rating"
}
},
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
},
"format": "CVSS"
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-625",
"description": "Permissive Regular Expression",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-11-11T15:57:26.470Z",
"orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"shortName": "redhat"
},
"references": [
{
"name": "RHSA-2024:1860",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1860"
},
{
"name": "RHSA-2024:1861",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1861"
},
{
"name": "RHSA-2024:1862",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1862"
},
{
"name": "RHSA-2024:1864",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1864"
},
{
"name": "RHSA-2024:1866",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1866"
},
{
"name": "RHSA-2024:1867",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1867"
},
{
"name": "RHSA-2024:1868",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/errata/RHSA-2024:1868"
},
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2023-6544"
},
{
"name": "RHBZ#2253116",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2253116"
}
],
"timeline": [
{
"lang": "en",
"time": "2023-12-06T00:00:00.000Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2024-04-16T00:00:00.000Z",
"value": "Made public."
}
],
"title": "Keycloak: authorization bypass",
"workarounds": [
{
"lang": "en",
"value": "No mitigation is currently available for this flaw."
}
],
"x_redhatCweChain": "CWE-625: Permissive Regular Expression"
}
},
"cveMetadata": {
"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749",
"assignerShortName": "redhat",
"cveId": "CVE-2023-6544",
"datePublished": "2024-04-25T15:58:47.204Z",
"dateReserved": "2023-12-06T05:42:36.249Z",
"dateUpdated": "2025-11-11T15:57:26.470Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…