CVE-2023-43496

Name: CVE-2023-43496
Creator: NVD / NIST
Published: 2023-09-20T17:15:11.82+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.94%

Last modified Jun 17, 2026

CVE-2023-43496 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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 estimates a 0.94% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

8.8/10

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

EPSS Probability

0.94%

56.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Jenkins	Jenkins	< 2.414.2
Jenkins	Jenkins	< 2.424

References

http://www.openwall.com/lists/oss-security/2023/09/20/5Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3072Vendor Advisory
http://www.openwall.com/lists/oss-security/2023/09/20/5Mailing List, Third Party Advisory
https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3072Vendor Advisory

Timeline

Published: Sep 20, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-43496?

How severe is CVE-2023-43496?

CVE-2023-43496 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.94% probability of exploitation in the next 30 days.

How do I fix CVE-2023-43496?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-43496?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST