CVE-2021-20741Network attack vector

Remote script injection via unspecified XSS vector

Published Jun 22, 2021 · Updated Aug 3, 2024

Cross-site scripting in Hitachi Application Server Help versions 10-11-01 and earlier allows remote attackers to inject arbitrary script via unspecified vectors. The affected manual content performs an undisclosed unsafe web-page generation operation; Hitachi and JPCERT/CC do not publish the vulnerable parameter, file, or function. Exploitation requires a user to load the affected help content in a web browser, where the script executes with low confidentiality and integrity impact and no reported availability impact.

CVSS severity6.1
Medium
EPSS probability0.75%
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 Application Server Help versions 10-11-01 and earlier allows remote attackers to inject arbitrary script via unspecified vectors. The affected manual content performs an undisclosed unsafe web-page generation operation; Hitachi and JPCERT/CC do not publish the vulnerable parameter, file, or function. Exploitation requires a user to load the affected help content in a web browser, where the script executes with low confidentiality and integrity impact and no reported availability impact.

The record

CVE
CVE-2021-20741
Published
Jun 22, 2021
Updated
Aug 3, 2024
Vendor
Hitachi
Product
Hitachi Application Server Help
Classifications
CWE-79, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 22, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=Hitachi Application Server V10 Manual (Windows) version 10-11-01 and earlier and Hitachi Application Server V10 Manual (UNIX) version 10-11-01 and earlier

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hitachi · Hitachi Application Server Helpversion=Hitachi Application Server V10 Manual (Windows) version 10-11-01 and earlier and Hitachi Application Server V10 Manual (UNIX) version 10-11-01 and earlier

Published CVSS scores

6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NVDAV:N/AC:M/Au:N/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1189Reflected 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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