CVE-2023-4203Public exploitNetwork attack vector

Session-context script execution via unsanitized ping input

Published Aug 8, 2023 · Updated Feb 13, 2025

Stored XSS in Advantech EKI-1521, EKI-1522, and EKI-1524 through 1.24 allows remote authenticated users to run session-context script. The /cgi-bin/ping.sh endpoint stores the ip parameter and renders it without neutralizing injected event-handler markup in the ping tool. Exploitation requires authenticated access and a victim to view or interact with the tainted ping result, exposing data and actions available to that session.

CVSS severity9.0
Critical
EPSS probability1.08%
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 Advantech EKI-1521, EKI-1522, and EKI-1524 through 1.24 allows remote authenticated users to run session-context script. The /cgi-bin/ping.sh endpoint stores the ip parameter and renders it without neutralizing injected event-handler markup in the ping tool. Exploitation requires authenticated access and a victim to view or interact with the tainted ping result, exposing data and actions available to that session.

The record

CVE
CVE-2023-4203
Published
Aug 8, 2023
Updated
Feb 13, 2025
Vendor
Advantech
Product
EKI-1524
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 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?

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

  1. Affected versionversion=0 <=1.24

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Advantech · EKI-1524version=0 <=1.24
Advantech · EKI-1521version=0 <=1.24; version=0 <1.24
Advantech · EKI-1522version=0 <=1.24; version=0 <1.24

Published CVSS scores

9.0CyberDanubeCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
5.4CISACVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
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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