CVE-2021-4266Network attack vector

Reflected XSS via unescaped baseUrl

Published Dec 21, 2022 · Updated Apr 14, 2025

Cross-site scripting in Hitachi Community Plugin Framework 9.5.0.0-80 allows remote attackers to run script in browsers via crafted baseUrl values. DependenciesPackage filter methods concatenate baseUrl into generated script and link HTML attributes without encoding, allowing attribute breaking and script injection. Exploitation requires a reachable Pentaho CTools path that passes attacker-controlled data and a victim browser rendering the response; the documented impact is client-side integrity and limited confidentiality compromise, not service interruption.

CVSS severity6.1
Medium
EPSS probability0.56%
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 Hitachi Community Plugin Framework 9.5.0.0-80 allows remote attackers to run script in browsers via crafted baseUrl values. DependenciesPackage filter methods concatenate baseUrl into generated script and link HTML attributes without encoding, allowing attribute breaking and script injection. Exploitation requires a reachable Pentaho CTools path that passes attacker-controlled data and a victim browser rendering the response; the documented impact is client-side integrity and limited confidentiality compromise, not service interruption.

The record

CVE
CVE-2021-4266
Published
Dec 21, 2022
Updated
Apr 14, 2025
Vendor
Hitachi
Product
Community Plugin Framework
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 21, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 14, 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=9.5.0.0-80

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hitachi · Community Plugin Frameworkversion=9.5.0.0-80

Published CVSS scores

6.1NVDCVSS: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.

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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.

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Technologies

Your stack

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Your stack

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