High severity · published Jan 25, 2022
CVE-2021-4133
A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the…
8.8
CVSS
1.4%
EPSS
No
On KEV
Description
A flaw was found in Keycloak in versions from 12.0.0 and before 15.1.1 which allows an attacker with any existing user account to create new default user accounts via the administrative REST API even when new user registration is disabled.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.4% · higher than 72% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Keycloak · Redhat
12.0.0 before 15.1.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-4133
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-4133
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2033602
Third Party Advisory
https://github.com/keycloak/keycloak/issues/9247
Third Party Advisory
https://github.com/keycloak/keycloak/security/advisories/GHSA-83x4-9cwr-5487
Not Applicable
https://www.oracle.com/security-alerts/cpuapr2022.html
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