CVE-2023-27903

File-parameter disclosure and tampering via permissive temporary files

Published Mar 8, 2023 · Updated Feb 28, 2025

Incorrect temporary-file permissions in Jenkins 2.393 and earlier and LTS 2.375.3 and earlier allow local users to read or alter CLI uploads. The controller writes standard-input file parameters into its default temporary directory using the process's default creation permissions. Exploitation requires controller filesystem access, a CLI-triggered build with a file parameter, and an operating system with a shared temporary directory.

CVSS severity4.4
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect temporary-file permissions in Jenkins 2.393 and earlier and LTS 2.375.3 and earlier allow local users to read or alter CLI uploads. The controller writes standard-input file parameters into its default temporary directory using the process's default creation permissions. Exploitation requires controller filesystem access, a CLI-triggered build with a file parameter, and an operating system with a shared temporary directory.

The record

CVE
CVE-2023-27903
Published
Mar 8, 2023
Updated
Feb 28, 2025
Vendor
Jenkins Project
Product
Jenkins
Classifications
CWE-863, T1005, T1565.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 28, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Jenkins Project · JenkinsAffected versions are unavailable in this record.

Published CVSS scores

4.4NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1005Data from Local System
T1565.001Stored Data Manipulation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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