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Keycloak user may register themselves with same email ID of any existing user

Moderate severity GitHub Reviewed Published Aug 27, 2022 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

maven org.keycloak:keycloak-core (Maven)

Affected versions

<= 19.0.1

Patched versions

None

Description

A flaw was found in keycloak where an attacker is able to register himself with the username same as the email ID of any existing user. This may cause trouble in getting password recovery email in case the user forgets the password.

References

Published by the National Vulnerability Database Aug 26, 2022
Published to the GitHub Advisory Database Aug 27, 2022
Reviewed Sep 16, 2022
Last updated Jan 27, 2023

Severity

Moderate

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS score

0.089%
(39th percentile)

Weaknesses

CVE ID

CVE-2021-3754

GHSA ID

GHSA-j9xq-j329-2xvg

Source code

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