CVE-2023-23372Network attack vector

Unauthenticated data disclosure via network-delivered cross-site scripting

Published Dec 8, 2023 · Updated Aug 2, 2024

Cross-site scripting in QNAP QTS and QuTS hero affected branches allows remote attackers to inject malicious code via a network. QNAP has not disclosed the affected component, input, or missing output-neutralization operation. Exploitation requires user interaction and can expose confidential data, with no vendor-reported integrity or availability impact.

CVSS severity6.5
Medium
EPSS probability0.45%
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 QNAP QTS and QuTS hero affected branches allows remote attackers to inject malicious code via a network. QNAP has not disclosed the affected component, input, or missing output-neutralization operation. Exploitation requires user interaction and can expose confidential data, with no vendor-reported integrity or availability impact.

The record

CVE
CVE-2023-23372
Published
Dec 8, 2023
Updated
Aug 2, 2024
Vendor
Linn Products Limited
Product
QuTS hero
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=h4.5.x <h4.5.4.2476 build 20230728
  2. Affected versionversion=h5.0.x <h5.0.1.2515 build 20230907
  3. Affected versionversion=h5.1.x <h5.1.0.2424 build 20230609

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Linn Products Limited · QuTS heroversion=h4.5.x <h4.5.4.2476 build 20230728; version=h5.0.x <h5.0.1.2515 build 20230907; version=h5.1.x <h5.1.0.2424 build 20230609
Linn Products Limited · QTSversion=4.5.x <4.5.4.2467 build 20230718; version=5.0.x <5.0.1.2425 build 20230609; version=5.1.x <5.1.0.2444 build 20230629

Published CVSS scores

6.1NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
6.5QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/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 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.

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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