What is CVE-2023-24456?

CVE-2023-24456 is a critical-severity vulnerability in Jenkins Keycloak Authentication, classified under Session Fixation. CVSS score: 9.8/10. Published 2023-01-26.

How severe is CVE-2023-24456?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Jenkins Keycloak Authentication

CVE-2023-24456

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

Published 2023-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (67.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Jenkins Keycloak Authentication
Jenkins Project Keycloak Authentication Plugin — versions unspecified, next of 2.3.0

Weakness classification (CWE)

CWE-384 — Session Fixation

References

www.jenkins.io/security/advisory/2023-01-24/ (Vendor Advisory)

Frequently asked questions

What is CVE-2023-24456?: CVE-2023-24456 is a critical-severity vulnerability in Jenkins Keycloak Authentication, classified under Session Fixation. CVSS score: 9.8/10. Published 2023-01-26.
How severe is CVE-2023-24456?: Critical severity. CVSS v3 base score is 9.8 out of 10.