CVE-2023-27903

Severity: medium (CVSS 4.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-03-10 · updated 2026-06-17
Weakness: CWE-863

Description

Jenkins 2.393 and earlier, LTS 2.375.3 and earlier creates a temporary file in the default temporary directory with the default permissions for newly created files when uploading a file parameter through the CLI, potentially allowing attackers with access to the Jenkins controller file system to read and write the file before it is used.

Affected products

Jenkins: before 2.375.4; before 2.394 — fixed in 2.375.4, 2.394

How to fix

Upgrade to a fixed version: Jenkins 2.375.4, 2.394. Check the vendor advisory for mitigations.

References

https://www.jenkins.io/security/advisory/2023-03-08/#SECURITY-3058
https://www.jenkins.io/security/advisory/2023-03-08/#SECURITY-3058

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