Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-v436-q368-hvgg
Advisory ID github_osv/GHSA-v436-q368-hvgg
Aliases CVE-2023-0091
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 5.9
Risk 3.0
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (2)
CWE-284 Improper Access Control
CWE-863 Incorrect Authorization
System Score Found at
cvssv3.1 6.5 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/01/GHSA-v436-q368-hvgg/GHSA-v436-q368-hvgg.json
generic_textual MODERATE
Reference id Reference type URL
https://github.com/keycloak/keycloak
CVE-2023-0091 https://access.redhat.com/security/cve/CVE-2023-0091
CVE-2023-0091 https://nvd.nist.gov/vuln/detail/CVE-2023-0091
GHSA-v436-q368-hvgg https://github.com/keycloak/keycloak/security/advisories/GHSA-v436-q368-hvgg
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
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/github/advisory-database/blob/main/advisories/github-reviewed/2023/01/GHSA-v436-q368-hvgg/GHSA-v436-q368-hvgg.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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2025-04-09T14:08:50Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2023/0xxx/CVE-2023-0091.json

Source Advisory: vulnrichment/CVE-2023-0091

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'no'},
 {'Technical Impact': 'partial'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]