CVE-2021-33001Network attack vector

Script execution via unescaped bdate parameter

Published May 16, 2022 · Updated Apr 16, 2025

Cross-site scripting in xArrow SCADA 7.2 and earlier allows remote attackers to execute script through a crafted bdate parameter. The xhisvalue.htm resource returns the bdate value in generated page content without neutralizing browser-interpreted characters. The web server is disabled by default, and exploitation requires a user to load the crafted response; impact is limited to data exposure or modification in that user's browser context.

CVSS severity6.1
Medium
EPSS probability0.79%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in xArrow SCADA 7.2 and earlier allows remote attackers to execute script through a crafted bdate parameter. The xhisvalue.htm resource returns the bdate value in generated page content without neutralizing browser-interpreted characters. The web server is disabled by default, and exploitation requires a user to load the crafted response; impact is limited to data exposure or modification in that user's browser context.

The record

CVE
CVE-2021-33001
Published
May 16, 2022
Updated
Apr 16, 2025
Vendor
xArrow
Product
xArrow SCADA
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 16, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <=7.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

xArrow · xArrow SCADAversion=unspecified <=7.2

Published CVSS scores

4.3NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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