CVEvulnerability

CVE-2018-19943

5.4 MEDIUM Known exploited Published 2020-10-28 Modified 2026-08-13 Official page ↗

CISA Known Exploited Vulnerability

QNAP NAS File Station Cross-Site Scripting Vulnerability — QNAP Network Attached Storage (NAS)

A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code.

Added to KEV: 2022-05-24
Remediation due: 2022-06-14
Ransomware use: Known
Required action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2018-19943

Status: Analyzed
Published: 2020-10-28
Last modified: 2026-08-13
Assigner: [email protected]
CVSS 3.1 ([email protected]): 8.0 HIGH — CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
CVSS 3.1 ([email protected]): 5.4 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0 ([email protected]): 3.5 LOW — AV:N/AC:M/Au:S/C:N/I:P/A:N
Weaknesses: CWE-79, CWE-80

Description

If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed these issues in the following QTS versions. QTS 4.4.2.1270 build 20200410 and later QTS 4.4.1.1261 build 20200330 and later QTS 4.3.6.1263 build 20200330 and later QTS 4.3.4.1282 build 20200408 and later QTS 4.3.3.1252 build 20200409 and later QTS 4.2.6 build 20200421 and later

Affected configurations

• qnap qts (< 4.2.6) • qnap qts (>= 4.3.1.0013 < 4.3.3.1252) • qnap qts (>= 4.3.4 < 4.3.4.1282) • qnap qts (>= 4.3.6 < 4.3.6.1263) • qnap qts (>= 4.4.0 < 4.4.1.1261) • qnap qts (>= 4.4.2 < 4.4.2.1270) • qnap qts 4.2.6

Weakness · CWE (2)

CWE-79 Improper Neutralization of Input During Web Page Generation weakness
CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page weakness

References