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Vulnerability details: VCID-919t-yfm6-dydu
Vulnerability ID VCID-919t-yfm6-dydu
Aliases CVE-2023-0091
GHSA-v436-q368-hvgg
GMS-2023-37
Summary Keycloak has lack of validation of access token on client registrations endpoint When a service account with the create-client or manage-clients role can use the client-registration endpoints to create/manage clients with an access token. If the access token is leaked, there is an option to revoke the specific token. However, the check is not performed in client-registration endpoints.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (5)
CWE-284 Improper Access Control
CWE-863 Incorrect Authorization
CWE-20 Improper Input Validation
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 3.8 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-0091.json
cvssv3.1 3.8 https://access.redhat.com/security/cve/CVE-2023-0091
cvssv3.1 6.5 https://access.redhat.com/security/cve/CVE-2023-0091
generic_textual MODERATE https://access.redhat.com/security/cve/CVE-2023-0091
ssvc Track https://access.redhat.com/security/cve/CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
epss 0.00069 https://api.first.org/data/v1/epss?cve=CVE-2023-0091
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-v436-q368-hvgg
cvssv3.1 6.5 https://github.com/keycloak/keycloak
generic_textual MODERATE https://github.com/keycloak/keycloak
cvssv3.1 6.5 https://github.com/keycloak/keycloak/security/advisories/GHSA-v436-q368-hvgg
cvssv3.1_qr MODERATE https://github.com/keycloak/keycloak/security/advisories/GHSA-v436-q368-hvgg
generic_textual MODERATE https://github.com/keycloak/keycloak/security/advisories/GHSA-v436-q368-hvgg
cvssv3.1 3.8 https://nvd.nist.gov/vuln/detail/CVE-2023-0091
cvssv3.1 6.5 https://nvd.nist.gov/vuln/detail/CVE-2023-0091
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2023-0091
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-0091.json
https://access.redhat.com/security/cve/CVE-2023-0091
https://api.first.org/data/v1/epss?cve=CVE-2023-0091
https://github.com/keycloak/keycloak
https://github.com/keycloak/keycloak/security/advisories/GHSA-v436-q368-hvgg
https://nvd.nist.gov/vuln/detail/CVE-2023-0091
2158585 https://bugzilla.redhat.com/show_bug.cgi?id=2158585
GHSA-v436-q368-hvgg https://github.com/advisories/GHSA-v436-q368-hvgg
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2023-0091.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/security/cve/CVE-2023-0091
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://access.redhat.com/security/cve/CVE-2023-0091
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-09T14:08:50Z/ Found at https://access.redhat.com/security/cve/CVE-2023-0091
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://github.com/keycloak/keycloak
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://github.com/keycloak/keycloak/security/advisories/GHSA-v436-q368-hvgg
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-0091
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2023-0091
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.21666
EPSS Score 0.00069
Published At July 30, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:41:53.485207+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/01/GHSA-v436-q368-hvgg/GHSA-v436-q368-hvgg.json 37.0.0