VULNERABILITY INTELLIGENCE

CVE-2021-3827

CVSS score6.8 MEDIUM
EPSS probability1.11%
CISA KEVNot currently listed
Published2022-08-23
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Description

A flaw was found in keycloak, where the default ECP binding flow allows other authentication flows to be bypassed. By exploiting this behavior, an attacker can bypass the MFA authentication by sending a SOAP request with an AuthnRequest and Authorization header with the user's credentials. The highest threat from this vulnerability is to confidentiality and integrity.

Weakness classification

  • secalert@redhat.com: CWE-287
  • nvd@nist.gov: CWE-287

Primary references