CVE-2023-4203 — Advantech EKI-1524, EKI-1522, EKI-1521 devices through 1

Advantech EKI-1524, EKI-1522, EKI-1521 devices through 1.21 are affected by a Stored Cross-Site Scripting vulnerability, which can be triggered by authenticated users in the ping tool of the web-interface.

01What is this vulnerability?

Advantech EKI-1524, EKI-1522, EKI-1521 devices through 1.21 are affected by a Stored Cross-Site Scripting vulnerability, which can be triggered by authenticated users in the ping tool of the web-interface.

02Affected products

Vendor	Product	Versions
Advantech	EKI	1524 — 0
Advantech	EKI	1522 — 0
Advantech	EKI	1521 — 0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-08-08T10:29:21.163Z
• Last modified: 2025-02-13T17:09:16.094Z

09References

• cyberdanube.com — https://cyberdanube.com/en/en-st-polten-uas-multiple-vulnerabilities-in-advantec…
• seclists.org — http://seclists.org/fulldisclosure/2023/Aug/13
• packetstormsecurity.com — http://packetstormsecurity.com/files/174153/Advantech-EKI-1524-CE-EKI-1522-EKI-1…