Session fixation vulnerability in Jenkins Keycloak Authentication Plugin

CRITICAL 9.8CVE-2023-24456 · GHSA-9963-gmh8-vvm6 · Published 26/01/2023 · updated 17/06/2026

In short

CVE-2023-24456 is a CRITICAL (CVSS 9.8) vulnerability affecting org.jenkins-ci.plugins:keycloak, keycloak authentication (jenkins).
Chance of exploitation in the next 30 days (EPSS): 1.2%, higher than 68.3% of all vulnerabilities.
Fix: update to 2.3.1 or later.

Package	Affected versions	Patched versions
org.jenkins-ci.plugins:keycloak Maven	`< 2.3.1`	`2.3.1`
keycloak authentication jenkins	`≤ 2.3.0`	No fix yet

Jenkins Keycloak Authentication Plugin 2.3.0 and earlier does not invalidate the previous session on login.

NVD description

Jenkins Keycloak Authentication Plugin 2.3.0 and earlier does not invalidate the previous session on login.

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