CVEvulnerability
CVE-2021-3827
6.8 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2022-08-23
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.8 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-287
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 configurations
• redhat keycloak (< 18.0.0)
• redhat single sign-on 7.0
• redhat single sign-on 7.5.0
• redhat openshift container platform 4.8
• redhat openshift container platform 4.9
Related
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- https://access.redhat.com/security/cve/CVE-2021-3827 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2007512 Issue Tracking, Vendor Advisory
- https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d Patch, Third Party Advisory
- https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-3827 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2007512 Issue Tracking, Vendor Advisory
- https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d Patch, Third Party Advisory
- https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v Third Party Advisory