CVE-2023-39059Public exploitNetwork attack vector

Authenticated command execution via unfiltered extra variables

Published Aug 28, 2023 · Updated Oct 2, 2024

Code injection in Ansible Semaphore 2.8.90 and earlier allows remote authenticated users to execute commands through crafted extra variables. Ansible Semaphore passes user-controlled extra-variable values unfiltered to ansible-playbook, whose lookup plugins evaluate pipe expressions as commands. Low-privileged project access to the environment interface is sufficient, permitting file access, outbound requests, and commands under the Semaphore service account.

CVSS severity8.8
High
EPSS probability1.73%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Ansible Semaphore 2.8.90 and earlier allows remote authenticated users to execute commands through crafted extra variables. Ansible Semaphore passes user-controlled extra-variable values unfiltered to ansible-playbook, whose lookup plugins evaluate pipe expressions as commands. Low-privileged project access to the environment interface is sufficient, permitting file access, outbound requests, and commands under the Semaphore service account.

The record

CVE
CVE-2023-39059
Published
Aug 28, 2023
Updated
Oct 2, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-94, T1059.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 2, 2024Record 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.004Unix Shell

Public exploit references

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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