CVE-2022-39026Network attack vector

Stored XSS via unfiltered HTTP header fields

Published Oct 31, 2022 · Updated May 6, 2025

Stored XSS in U-Office Force through 20.50.7821D Build:202104sp1 allows remote authenticated users to inject JavaScript. The UserDefault page accepts special characters in HTTP header fields without adequate filtering and stores attacker-supplied script content for later rendering. A general user account is required, and the payload executes when another user views the stored content, allowing access to or modification of browser-visible data.

CVSS severity5.4
Medium
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in U-Office Force through 20.50.7821D Build:202104sp1 allows remote authenticated users to inject JavaScript. The UserDefault page accepts special characters in HTTP header fields without adequate filtering and stores attacker-supplied script content for later rendering. A general user account is required, and the payload executes when another user views the stored content, allowing access to or modification of browser-visible data.

The record

CVE
CVE-2022-39026
Published
Oct 31, 2022
Updated
May 6, 2025
Vendor
e-Excellence Inc.
Product
U-Office Force
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 31, 2022CVE publishedPublication date reported by the CVE source.
  2. May 6, 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 <=20.50.7821D Build:202104sp1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

e-Excellence Inc. · U-Office Forceversion=unspecified <=20.50.7821D Build:202104sp1

Published CVSS scores

5.4TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript

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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