CVE-2021-43551Network attack vector

Data disclosure and modification via stored display XSS

Published Nov 17, 2021 · Updated Sep 16, 2024

Stored cross-site scripting in AVEVA PI Vision 2021 and earlier allows remote authenticated users to inject code into shared displays. The display renderer stores attacker-controlled markup without neutralizing executable content, so Internet Explorer executes it when opening the display. Exploitation requires display-write access and victim interaction; the injected code can disclose, modify, or delete PI System data and other data available under the victim's permissions.

CVSS severity6.5
Medium
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Stored cross-site scripting in AVEVA PI Vision 2021 and earlier allows remote authenticated users to inject code into shared displays. The display renderer stores attacker-controlled markup without neutralizing executable content, so Internet Explorer executes it when opening the display. Exploitation requires display-write access and victim interaction; the injected code can disclose, modify, or delete PI System data and other data available under the victim's permissions.

The record

CVE
CVE-2021-43551
Published
Nov 17, 2021
Updated
Sep 16, 2024
Vendor
AVEVA
Product
AVEVA PI Vision
Classifications
CWE-79, T1189
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=All versions <=2021

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AVEVA · AVEVA PI Visionversion=All versions <=2021

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
6.5ICS-CERTCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1189Drive-by Compromise

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo