Vulnerability Monitor

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CVE-2018-19943

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

Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.0, indicating it can be exploited remotely over the network but requires specific conditions to be met though user interaction is required requiring only low-level privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 1 product from qnap organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-10-28T18:15:12.520

Last Modified

2025-11-03T15:06:56.100

Status

Analyzed

Source

[email protected]

Severity

CVSSv3.1: 8.0 (HIGH)

CVSSv2 Vector

AV:N/AC:M/Au:S/C:N/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

6.8

Impact Score

2.9

Weaknesses

Type: Secondary
CWE-79
CWE-80
Type: Primary
CWE-79

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Operating System	qnap	qts	< 4.2.6	Yes
Operating System	qnap	qts	< 4.3.3.1252	Yes
Operating System	qnap	qts	< 4.3.4.1282	Yes
Operating System	qnap	qts	< 4.3.6.1263	Yes
Operating System	qnap	qts	< 4.4.1.1261	Yes
Operating System	qnap	qts	< 4.4.2.1270	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes
Operating System	qnap	qts	4.2.6	Yes

References

https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 Vendor Advisory ([email protected])
https://www.qnap.com/zh-tw/security-advisory/qsa-20-01 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19943 US Government Resource (134c704f-9b21-4f2e-91b3-4a467353bcc0)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For qnap's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.