CVE-2024-40739Public exploitNetwork attack vector

Browser script execution via power-feed Name injection

Published Jul 9, 2024 · Updated Aug 2, 2024

XSS in NetBox 4.0.3 allows attackers to run scripts in another user's browser through a crafted power-feed Name value. The power-feed creation path handles the Name value without effective output neutralization, so script or HTML markup is interpreted by a browser. Another user must load the affected interface for the injected code to run; public records establish no broader server-side impact.

CVSS severity6.1
Medium
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

XSS in NetBox 4.0.3 allows attackers to run scripts in another user's browser through a crafted power-feed Name value. The power-feed creation path handles the Name value without effective output neutralization, so script or HTML markup is interpreted by a browser. Another user must load the affected interface for the injected code to run; public records establish no broader server-side impact.

The record

CVE
CVE-2024-40739
Published
Jul 9, 2024
Updated
Aug 2, 2024
Vendor
NetBox Labs
Product
NetBox
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 9, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.0.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

NetBox Labs · NetBoxversion=4.0.3

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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