Cyber Resilience

CVE-2024-5420

High

Published: 04 June 2024

Published
04 June 2024
Modified
15 April 2026
KEV Added
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Patch
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CVSS Score v4 8.3 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS Score 0.4002 97.4th percentile
Risk Priority 41 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2024-5420 is a high-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 8.3 (High).

Operationally, ranked in the top 2.6% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

Deeper analysis

CVE-2024-5420 is a stored cross-site scripting vulnerability caused by missing input validation in the web interface of SEH Computertechnik utnserver Pro, utnserver ProMAX, and INU-100 devices. The flaw affects all versions through 20.1.22 and is tracked under CWE-79 with a CVSS 4.0 score of 8.3.

An unauthenticated remote attacker can supply malicious input that is stored and later rendered in the browsers of other users who access the interface. Successful exploitation can result in high-impact effects on confidentiality and availability along with limited integrity impact, all triggered without requiring prior authentication or user interaction beyond visiting the affected page.

The EPSS score for this CVE rose from a low baseline to a peak of 0.5335 on 2026-03-01 before receding to the current value of 0.4002, indicating that exploitation interest increased after public disclosure. No specific patch or mitigation guidance is provided in the referenced advisories.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-79

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

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INU-100
inferred from references and description; NVD did not file a CPE for this CVE

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References