CVE-2023-6134 MEDIUM

CVE-2023-6134: Keycloak: reflected xss via wildcard in oidc redirect_uri

Vendor Red Hat
Product Red Hat build of Keycloak 22.0.7
Weakness CWE-79 · XSS
Published December 14, 2023
Last update February 25, 2026
View on NVD All CVEs

CVSS base score

4.6/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

What the vulnerability does

01Description

A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.

Key dates

02Disclosure timeline

December 14, 2023 CVE published
February 25, 2026 Record updated