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Authentication Bypass in keycloak

High severity GitHub Reviewed Published Mar 18, 2022 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

maven org.keycloak:keycloak-core (Maven)

Affected versions

< 12.0.0

Patched versions

12.0.0

Description

A flaw was found in Keycloak before version 12.0.0 where it is possible to update the user's metadata attributes using Account REST API. This flaw allows an attacker to change its own NameID attribute to impersonate the admin user for any particular application.

References

Published by the National Vulnerability Database May 28, 2021
Reviewed Jun 1, 2021
Published to the GitHub Advisory Database Mar 18, 2022
Last updated Feb 1, 2023

Severity

High
8.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CVE ID

CVE-2020-27826

GHSA ID

GHSA-m9cj-v55f-8x26

Source code

No known source code
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