CVE-2018-19953
medium CISA KEVQNAP NAS File Station Cross-Site Scripting Vulnerability
Vendor / product: QNAP — Network Attached Storage (NAS)
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.
CVSS
6.1
6.1 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2020-10-28 18:15
Modified: 2026-10-01 20:17
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-10-27 07:07 UTC
Exploitation
Listed in CISA KEV
Added 2022-05-24 · due 2022-06-14
Known ransomware use: Known
Required action (CISA)
Apply updates per vendor instructions.
Affected products
qnap / qts <4.2.6, ≥4.3.1.0013 <4.3.3.1161, ≥4.3.4 <4.3.4.1190, ≥4.3.6 <4.3.6.1218, ≥4.4.0 <4.4.1.1201, ≥4.4.2 <4.4.2.1231
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://www.qnap.com/zh-tw/security-advisory/qsa-20-01
Vendor advisory: https://www.qnap.com/zh-tw/security-advisory/qsa-20-01
References
- https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 security@qnapsecurity.com.tw
- https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 af854a3a-2127-422b-91ae-364da2661108
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19953 134c704f-9b21-4f2e-91b3-4a467353bcc0
Data sources
CISA KEV — fetched 2026-10-27 06:50 UTC · record ↗
NVD CVE API 2.0 — fetched 2026-10-27 07:07 UTC · record ↗