What is CVE-2023-34412?

CVE-2023-34412 is a medium-severity vulnerability in Helmholz Rex 200, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-08-17.

How severe is CVE-2023-34412?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Helmholz Rex 200

CVE-2023-34412

A vulnerability in Red Lion Europe mbNET/mbNET.rokey and Helmholz REX 200 and REX 250 devices with firmware lower 7.3.2 allows an authenticated remote attacker with high privileges to inject malicious HTML or JavaScript code (XSS).

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-08-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (35.8th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

cert.vde.com/en/advisories/VDE-2023-012/ (Third Party Advisory)
cert.vde.com/en/advisories/VDE-2023-029/ (Third Party Advisory)

Frequently asked questions

What is CVE-2023-34412?: CVE-2023-34412 is a medium-severity vulnerability in Helmholz Rex 200, classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2023-08-17.
How severe is CVE-2023-34412?: Medium severity. CVSS v3 base score is 4.8 out of 10.