No exploitation reportedFix available

CVE-2023-24456

Q: Is CVE-2023-24456 actively exploited?

Active exploitation of CVE-2023-24456 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2023-24456?

CVE-2023-24456 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2023-01-26
WeaknessCWE-384

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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

Timeline

dates in UTC

2023-01-2621:18CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-24456?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-24456?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD · OSV

Jenkins keycloak authentication

Branch	Affected	Fixed in	Source
2.3	≤ 2.3.0	no fix published	NVD

keycloak

Branch	Affected	Fixed in	Source
2.3	< 2.3.1	2.3.1	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Advisories and patches

www.jenkins.ioVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2025-04-02
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.19.82025-04-02
NVDCVSS 3.19.8read 2026-10-23
CISA-ADPweakness (CWE)CWE-3842025-04-02
NVDweakness (CWE)CWE-384read 2026-10-23
FIRST EPSSEPSS score1.2 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2023-01-26
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2023-24456?

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

Is CVE-2023-24456 actively exploited?

Active exploitation of CVE-2023-24456 has not been confirmed. Its EPSS score was 1.2% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-24456?

CVE-2023-24456 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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