CVE-2023-27899

Severity: high (CVSS 7.0 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 plugin for installation, potentially allowing attackers with access to the Jenkins controller file system to read and write the file before it is used, potentially resulting in arbitrary code execution.

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-2823
https://www.jenkins.io/security/advisory/2023-03-08/#SECURITY-2823

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