CVE-2021-3424
MEDIUMRed Hat Single Sign-On 7.4 - IDN Homograph Attack via User Registration
Title source: llmDescription
A flaw was found in keycloak as shipped in Red Hat Single Sign-On 7.4 where IDN homograph attacks are possible. A malicious user can register himself with a name already registered and trick admin to grant him extra privileges.
References (1)
Core 1
Core References
Issue Tracking, Vendor Advisory x_refsource_misc
https://bugzilla.redhat.com/show_bug.cgi?id=1933320
Scores
CVSS v3
5.3
EPSS
0.0016
EPSS Percentile
36.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Details
CWE
CWE-287
Status
published
Products (2)
org.keycloak/keycloak-services
0 - 18.0.0Maven
redhat/single_sign-on
7.4
Published
Jun 01, 2021
Tracked Since
Feb 18, 2026