CVE-2023-43498
highpriority · track · 32EPSS 0.010 · 61 %ileDEEURUUSEPSS · scored 2026-10-23
In Jenkins 2.423 and earlier, LTS 2.414.1 and earlier, processing file uploads using MultipartFormDataParser creates temporary files in the default system temporary directory with the default permissions for newly created files, potentially allowing attackers with access to the Jenkins controller file system to read and write the files before they are used.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 3.6–8.1
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (10)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2023-2411Jenkins: Mehrere SchwachstellenDeutsch2023-09-20csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Jenkins ausnutzen, um beliebigen Code auszuführen, vertrauliche Informationen offenzulegen, XSS-Angriffe durchzuführen, Dateien zu manipulieren oder Cross-Site Request Forgery-Angriffe durchzuführen.
- GHSA-hq87-h4jg-vxfwJenkins temporary uploaded file created with insecure permissions2023-09-20ghsa · osvUS
In Jenkins 2.423 and earlier, LTS 2.414.1 and earlier, uploaded files processed via the Stapler web framework and the Jenkins API `MultipartFormDataParser` create temporary files in the system temporary directory with the default permissions for newly created files. If these permissions are overly permissive, attackers with access to the system temporary directory may be able to read and write the file before it is used. This vulnerability only affects operating systems using a shared temporary directory for all users (typically Linux). Additionally, the default permissions for newly created files generally only allow attackers to read the temporary file, but not write to it. Jenkins 2.424, LTS 2.414.2 creates the temporary files in a subdirectory with more restrictive permissions. As a workaround, you can change your default temporary-file directory using the Java system property `java.io.tmpdir`, if you’re concerned about this issue but unable to immediately update Jenkins.
- BIT-jenkins-2023-434982024-03-06vendor · osvUS
In Jenkins LTS 2.414.1 and earlier, processing file uploads using MultipartFormDataParser creates temporary files in the default system temporary directory with the default permissions for newly created files, potentially allowing attackers with access to the Jenkins controller file system to read and write the files before they are used.
also known as (6)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- http://www.openwall.com/lists/oss-security/2023/09/20/5cnnvd
- https://cxsecurity.com/cveshow/CVE-2023-43498/cnnvd
- https://www.auscert.org.au/bulletins/ESB-2023.5437cnnvd
- https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3073cnnvd
- http://www.openwall.com/lists/oss-security/2023/09/20/5enisa_euvd
- https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3073enisa_euvd
- http://www.openwall.com/lists/oss-security/2023/09/20/5Mailing ListThird Party Advisorynvd
- https://www.jenkins.io/security/advisory/2023-09-20/#SECURITY-3073Vendor Advisorynvd
Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.
Free scan