CVE-2024-40728Network attack vector

Stored script execution via unescaped port names

Published Jul 9, 2024 · Updated Aug 2, 2024

Stored XSS in NetBox 4.0.3 allows remote authenticated users to execute scripts in another user's browser through a crafted port name. The console-server-port Name value is stored and rendered as a safe string without HTML escaping in the edit-interface workflow. Exploitation requires permission to edit the object and a victim to view the resulting interface, exposing that browser session to attacker-controlled script actions.

CVSS severity6.1
Medium
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in NetBox 4.0.3 allows remote authenticated users to execute scripts in another user's browser through a crafted port name. The console-server-port Name value is stored and rendered as a safe string without HTML escaping in the edit-interface workflow. Exploitation requires permission to edit the object and a victim to view the resulting interface, exposing that browser session to attacker-controlled script actions.

The record

CVE
CVE-2024-40728
Published
Jul 9, 2024
Updated
Aug 2, 2024
Vendor
NetBox Labs
Product
NetBox
Classifications
CWE-79, CAPEC-592, T1059.007
Attack vector
network
Privileges
authenticated

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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 privilegesauthenticated

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
7.1CISA ADP VulnrichmentCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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