Medium severity6.8NVD Advisory· Published Aug 23, 2022· Updated Jun 17, 2026
CVE-2021-3827
CVE-2021-3827
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.keycloak:keycloak-saml-coreMaven | < 18.0.0 | 18.0.0 |
Affected products
7cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:single_sign-on:7.5.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:openshift_container_platform:4.8:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:redhat:openshift_container_platform:4.8:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:openshift_container_platform:4.9:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
6- github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0dnvdPatchThird Party AdvisoryWEB
- access.redhat.com/security/cve/CVE-2021-3827nvdVendor AdvisoryWEB
- bugzilla.redhat.com/show_bug.cginvdIssue TrackingVendor AdvisoryWEB
- github.com/advisories/GHSA-4pc7-vqv5-5r3vghsaADVISORY
- github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3vnvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-3827ghsaADVISORY
News mentions
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