CVE Tools
Sign in

CVE-2021-3827

Published: Aug 23, 2022Updated: Nov 21, 2024 Sources: CVE List NVD GHSA BDUCWE-287
6.8MEDIUM
NVD MITRE
EPSS Score
0.9%
Top 45.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:LUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-287

Affected Products

Red Hat Inc.
commercial·USaka redhat, red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
KeycloakOn-prem
Operating Systems / linux-distro
Red Hat Single Sign-OnOn-prem
Operating Systems / linux-distro
Red Hat A-MQ OnlineOn-prem
Operating Systems / linux-distro
single sign-onOn-prem
Operating Systems / linux-distro
openshift container platformOn-prem
Operating Systems / linux-distro
Sonatype Inc.
commercial·USaka sonatype
Nexus Repository ManagerMixed
DevTools & CI / artifact-registry
Maven
package-ecosystem
org.keycloak:keycloak-saml-core
OSS Libraries
and 2 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2021-3827?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/keycloak/keycloak/security/advisories/GHSA-4pc7-vqv5-5r3v
github.com
https://github.com/keycloak/keycloak/commit/44000caaf5051d7f218d1ad79573bd3d175cad0d
github.com
https://bugzilla.redhat.com/show_bug.cgi?id=2007512
bugzilla.redhat.com
and 4 more references View all →
News mentions
Could not load news mentions.

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2021-3827 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows