What is CVE-2023-43496?

CVE-2023-43496 is a high-severity vulnerability in Jenkins, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2023-09-20.

How severe is CVE-2023-43496?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Jenkins

CVE-2023-43496

Jenkins 2.423 and earlier, LTS 2.414.1 and earlier creates a temporary file in the system temporary directory with the default permissions for newly created files when installing a plugin from a URL, potentially allowing attackers with access to the system temporary directory to replace the file before it is installed in Jenkins, potentially resulting in arbitrary code execution.

EPSS: 0.009 (57.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Jenkins
Jenkins Project — versions 2.424, 2.414.2

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

References

jenkinsci-cert@googlegroups.com (vendor-advisory, Vendor Advisory)
jenkinsci-cert@googlegroups.com (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2023-43496?: CVE-2023-43496 is a high-severity vulnerability in Jenkins, classified under Incorrect Default Permissions. CVSS score: 8.8/10. Published 2023-09-20.
How severe is CVE-2023-43496?: High severity. CVSS v3 base score is 8.8 out of 10.