Staging Environment: Content and features may be unstable or change without notice.
Advisory details: github_osv / GHSA-pcv5-m2wh-66j3
Advisory ID github_osv/GHSA-pcv5-m2wh-66j3
Aliases CVE-2020-27838
Summary Keycloak discloses information without authentication A flaw was found in keycloak in versions prior to 13.0.0. The client registration endpoint allows fetching information about PUBLIC clients (like client secret) without authentication which could be an issue if the same PUBLIC client changed to CONFIDENTIAL later. The highest threat from this vulnerability is to data confidentiality.
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 (1)
CWE-287 Improper Authentication
System Score Found at
cvssv3.1 6.5 https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-pcv5-m2wh-66j3/GHSA-pcv5-m2wh-66j3.json
generic_textual MODERATE
Reference id Reference type URL
https://bugzilla.redhat.com/show_bug.cgi?id=1906797
https://github.com/keycloak/keycloak/commit/9356843c6c3d7097d010b3bb6f91e25fcaba378c
https://github.com/keycloak/keycloak/pull/7790
CVE-2020-27838 https://nvd.nist.gov/vuln/detail/CVE-2020-27838
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:R/S:U/C:H/I:N/A:N Found at https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-pcv5-m2wh-66j3/GHSA-pcv5-m2wh-66j3.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

There are no SSVC decisions available.