CVE-2023-0937Public exploitNetwork attack vector

Reflected XSS via unescaped request URI attribute

Published Mar 20, 2023 · Updated Feb 25, 2025

Reflected XSS in Vektor,Inc. VK All in One Expansion Unit before 9.87.1.0 allows remote attackers to execute script via a crafted URL. The CSS customization admin page inserts $_SERVER['REQUEST_URI'] into an HTML attribute without escaping, allowing attribute breakout. Exploitation requires a logged-in administrator to open the crafted URL in an older browser that leaves the payload characters unencoded.

CVSS severity6.1
Medium
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in Vektor,Inc. VK All in One Expansion Unit before 9.87.1.0 allows remote attackers to execute script via a crafted URL. The CSS customization admin page inserts $_SERVER['REQUEST_URI'] into an HTML attribute without escaping, allowing attribute breakout. Exploitation requires a logged-in administrator to open the crafted URL in an older browser that leaves the payload characters unencoded.

The record

CVE
CVE-2023-0937
Published
Mar 20, 2023
Updated
Feb 25, 2025
Vendor
Vektor,Inc.
Product
VK All in One Expansion Unit
Classifications
CWE-79, T1204.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 20, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 25, 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=0 <9.87.1.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Vektor,Inc. · VK All in One Expansion Unitversion=0 <9.87.1.0

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.1CISA-ADPCVSS: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.

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204.001User Execution: Malicious Link

Public exploit references

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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