CVE-2020-27838
MEDIUM NUCLEIRedhat Keycloak < 13.0.0 - Authentication Bypass
Title source: ruleDescription
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.
Exploits (1)
nomisec
SCANNER
2 stars
by Cappricio-Securities · poc
https://github.com/Cappricio-Securities/CVE-2020-27838
Nuclei Templates (1)
KeyCloak - Information Exposure
MEDIUMby mchklt
Shodan:
title:"keycloak" || http.title:"keycloak" || http.html:"keycloak" || http.favicon.hash:-1105083093
FOFA:
title="keycloak" || icon_hash=-1105083093 || body="keycloak"
Scores
CVSS v3
6.5
EPSS
0.8514
EPSS Percentile
99.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Details
CWE
CWE-287
Status
published
Products (3)
org.keycloak/keycloak-core
0 - 13.0.0Maven
redhat/keycloak
< 13.0.0
redhat/single_sign-on
7.0
Published
Mar 08, 2021
Tracked Since
Feb 18, 2026