What is CVE-2021-33001?

CVE-2021-33001 is a medium-severity vulnerability in Xarrow, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-05-16.

How severe is CVE-2021-33001?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Xarrow

CVE-2021-33001

xArrow SCADA versions 7.2 and prior is vulnerable to cross-site scripting due to parameter ‘bdate’ of the resource xhisvalue.htm, which may allow an unauthorized attacker to execute arbitrary code.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-05-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (56.0th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: +0.001

Affected products

Xarrow
Xarrow Scada — versions unspecified

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.cisa.gov/uscert/ics/advisories/icsa-21-229-03 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2021-33001?: CVE-2021-33001 is a medium-severity vulnerability in Xarrow, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-05-16.
How severe is CVE-2021-33001?: Medium severity. CVSS v3 base score is 6.1 out of 10.