CVE-2018-19953: QNAP NAS File Station Cross-Site Scripting Vulnerability
Reference page built from the source records below, each shown as its source publishes it. Dataset version ref-493f021ce52d, updated 2026-11-02T23:39:54.475Z.
CISA Known Exploited Vulnerabilities
- Name
- QNAP NAS File Station Cross-Site Scripting Vulnerability
- Vendor
- QNAP
- Product
- Network Attached Storage (NAS)
- Added to the catalog
- 2022-05-24
- Due date for US federal agencies
- 2022-06-14
- Weaknesses
- CWE-79, CWE-80
- Catalog version
- 2026.10.30
A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code.
Required action (CISA)
Apply updates per vendor instructions.
Ransomware use: CISA marks this vulnerability as known to be used in ransomware campaigns. CISA does not say which group used it.
Links in CISA's notes
Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
NVD analysis
- Status
- Analyzed
- Published
- 2020-10-28T18:15:12.740
- Last modified
- 2026-10-01T20:17:17.020
- Weaknesses
- CWE-79, CWE-80
If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.
| Metric | Score | Severity | Vector | Scored by |
|---|---|---|---|---|
| CVSS 3.1 | 6.1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | [email protected] (Primary) |
| CVSS 3.1 | 6.1 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N | 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary) |
| CVSS 2.0 | 4.3 | MEDIUM | AV:N/AC:M/Au:N/C:N/I:P/A:N | [email protected] (Primary) |
References
- https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 (Vendor Advisory)
- https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 (Vendor Advisory)
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19953 (US Government Resource)
This product uses the NVD API but is not endorsed or certified by the NVD.
Read on 2026-11-02T23:41:51.476Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2018-19953
CVE record
- Assigner
- qnap
- State
- PUBLISHED
- Published
- 2020-10-28T17:55:18.000Z
- Updated
- 2026-10-01T19:26:08.359Z
- Problem types
- CWE-79 Cross-site Scripting (XSS); CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.
References
Read on 2026-11-03T00:36:45.892Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2018/19xxx/CVE-2018-19953.json
Defensive techniques (MITRE D3FEND)
D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
- Harden: Trusted Library (acts on Subroutine)
- Harden: Variable Initialization (acts on Subroutine)
- Isolate: Application-based Process Isolation (acts on Subroutine)
- Harden: Software Update (acts on Software)
- Harden: Domain Logic Validation (acts on Subroutine)
- Harden: Credential Scrubbing (acts on Subroutine)
- Restore: Restore Software (acts on Software)
- Model: Asset Vulnerability Enumeration (acts on Software)
- Model: Software Inventory (acts on Software)
D3FEND ontology version 1.6.0.
Read on 2026-11-02T23:54:18.062Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-79.json
CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)
- Harden: Credential Scrubbing (acts on Subroutine)
- Isolate: Application-based Process Isolation (acts on Subroutine)
- Harden: Variable Initialization (acts on Subroutine)
- Model: Software Inventory (acts on Software)
- Model: Asset Vulnerability Enumeration (acts on Software)
- Harden: Trusted Library (acts on Subroutine)
- Harden: Software Update (acts on Software)
- Harden: Domain Logic Validation (acts on Subroutine)
- Restore: Restore Software (acts on Software)
D3FEND ontology version 1.6.0.
Read on 2026-11-02T23:54:19.613Z under licence d3fend-terms-of-use@f98cbc7e from https://d3fend.mitre.org/api/weakness/cwe/CWE-80.json
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Sources and licences
CISA
Source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30, CC0 1.0. Use of this data does not imply endorsement by CISA or DHS.
National Vulnerability Database (NIST)
This product uses the NVD API but is not endorsed or certified by the NVD.
NVD API Terms of Use (NIST publications in the public domain, 17 U.S.C. 105)
CVE Program, The MITRE Corporation
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MITRE D3FEND
MITRE D3FEND™ knowledge graph. © 2025 The MITRE Corporation.
"The MITRE Corporation (MITRE) hereby grants you a non-exclusive, royalty-free license to use D3FEND for research, development, and commercial purposes. Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." Terms: https://d3fend.mitre.org/tou/MITRE D3FEND Terms of Use (site + knowledge graph); source repo MIT
Cite this page
Dragons Eye Ransomware Tracker, "CVE-2018-19953: QNAP NAS File Station Cross-Site Scripting Vulnerability",
entity page, dataset version ref-493f021ce52d, updated 2026-11-02T23:39:54.475Z,
https://ransomware-tracker.com/cve/CVE-2018-19953 (accessed 2026-11-03).
Underlying source: CISA Catalog of Known Exploited Vulnerabilities, version 2026.10.30.
Underlying source: National Vulnerability Database (NIST), CVE API 2.0, record last modified 2026-10-01T20:17:17.020.
Underlying source: CVE List (CVE Program, The MITRE Corporation), record updated 2026-10-01T19:26:08.359Z.
Underlying source: MITRE D3FEND, ontology version 1.6.0.
Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.