CVE-2020-27838

nvd nist nuclei

Published: Mar 8, 2021Modified: Jun 17, 2026

6.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Exploitability: 2.8 / Impact: 3.6

Source: NVD

Description

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.

Affected (2)

Products: Redhat: Keycloak, Single Sign On

2 products

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Redhat Keycloak	Before 13.0.0
Redhat Single Sign On	Version 7.0

Related CWEs

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

References (2)

https://bugzilla.redhat.com/show_bug.cgi?id=1906797

Source: secalert@redhat.com

Issue TrackingVendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=1906797

Source: af854a3a-2127-422b-91ae-364da2661108

Issue TrackingVendor Advisory

Timeline

No history available yet.