CVE-2022-3958Network attack vector

Stored XSS via unescaped personal-menu markup

Published Nov 15, 2022 · Updated Apr 29, 2025

Stored XSS in the BlueSpiceUserSidebar extension before 4.2.1 allows remote authenticated users to inject HTML into personal menus. The extension renders editor-supplied personal-menu markup as HTML without neutralizing executable content. A regular account with edit permission is required, and execution occurs when a targeted user views the manipulated navigation.

CVSS severity5.4
Medium
EPSS probability0.27%
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 the BlueSpiceUserSidebar extension before 4.2.1 allows remote authenticated users to inject HTML into personal menus. The extension renders editor-supplied personal-menu markup as HTML without neutralizing executable content. A regular account with edit permission is required, and execution occurs when a targeted user views the manipulated navigation.

The record

CVE
CVE-2022-3958
Published
Nov 15, 2022
Updated
Apr 29, 2025
Vendor
Hallo Welt! GmbH
Product
BlueSpice
Classifications
CWE-79, T1203
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Nov 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 29, 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=4 <4.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Hallo Welt! GmbH · BlueSpiceversion=4 <4.2.1

Published CVSS scores

3.3Hallo Welt! GmbHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
5.4NIST NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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')
T1203Exploitation for Client Execution

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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