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Keycloak Cross-site Scripting on OpenID connect login service

High severity GitHub Reviewed Published Feb 27, 2023 in keycloak/keycloak • Updated Nov 8, 2023

Package

maven org.keycloak:keycloak-parent (Maven)

Affected versions

< 20.0.5

Patched versions

20.0.5

Description

A reflected cross-site scripting (XSS) vulnerability was found in the oob OAuth endpoint due to incorrect null-byte handling. This issue allows a malicious link to insert an arbitrary URI into a Keycloak error page.

References

@abstractj abstractj published to keycloak/keycloak Feb 27, 2023
Published to the GitHub Advisory Database Mar 1, 2023
Reviewed Mar 1, 2023
Published by the National Vulnerability Database Sep 25, 2023
Last updated Nov 8, 2023

Severity

High

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
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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:R/S:U/C:H/I:H/A:N

EPSS score

0.141%
(51st percentile)

Weaknesses

CVE ID

CVE-2022-4137

GHSA ID

GHSA-9hhc-pj4w-w5rv

Source code

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