CVE-2021-3827

MEDIUM
6.8
CVSS Score
Published: August 23, 2022 at 03:52 PM UTC
Updated: June 17, 2026 at 04:05 AM UTC
4 products affected across 2 vendorsOpenShift Container PlatformSingle Sign onKeycloak

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Severity
MEDIUM6.8
Exploit prediction
EPSS 1%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 18.0.0
Vendor states this is fixed in 18.0.0 (unaffected)
redhat-enterprise-linux (environment)
redhat-enterprise-linux (environment)
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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