What is CVE-2023-4523?

CVE-2023-4523 is a critical-severity vulnerability in Real Time Automation 460 Series, classified under Cross-site Scripting. CVSS score: 9.4/10. Published 2023-09-27.

How severe is CVE-2023-4523?

Critical severity. CVSS v3 base score is 9.4 out of 10.

Is CVE-2023-4523 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

XSS in Real Time Automation 460 Series

CVE-2023-4523

Real Time Automation 460 Series products with versions prior to v8.9.8 are vulnerable to cross-site scripting, which could allow an attacker to run any JavaScript reference from the URL string. If this were to occur, the gateway's HTTP interface would redirect to the main page, which is index.htm.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-09-27 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.004 (32.5th percentile), scored 2026-10-05.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

www.cisa.gov/news-events/ics-advisories/icsa-23-264-01 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2023-4523?: CVE-2023-4523 is a critical-severity vulnerability in Real Time Automation 460 Series, classified under Cross-site Scripting. CVSS score: 9.4/10. Published 2023-09-27.
How severe is CVE-2023-4523?: Critical severity. CVSS v3 base score is 9.4 out of 10.
Is CVE-2023-4523 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.