Input validation error in Keycloak - CVE-2021-3754
Published: June 28, 2023 / Updated: June 24, 2024
Vulnerability identifier: #VU77751
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2021-3754
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Keycloak
Affected software:
Keycloak
Keycloak
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can register himself with the username same as the email ID of any existing user and perform a denial of service (DoS) attack.
How to mitigate CVE-2021-3754
Install updates from vendor's website.