CVE-2018-19942: QNAP QTS

Medium severity, CVSS 6.1. EPSS: 0.7% chance of exploitation in the next 30 days.

A cross-site scripting (XSS) vulnerability has been reported to affect earlier versions of File Station. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 build 20210202 (and later) QTS 4.5.1.1456 build 20201015 (and later) QTS 4.3.6.1446 build 20200929 (and later) QTS 4.3.4.1463 build 20201006 (and later) QTS 4.3.3.1432 build 20201006 (and later) QTS 4.2.6 build 20210327 (and later) QuTS hero h4.5.1.1472 build 20201031 (and later) QuTScloud c4.5.4.1601 build 20210309 (and later) QuTScloud c4.5.3.1454 build 20201013 (and later)

Affected products

• QNAP QTS: before 4.2.6 (fixed in 4.2.6); from 4.3.5, before 4.3.6 (fixed in 4.3.6); from 4.4.0, before 4.5.1 (fixed in 4.5.1); version 4.2.6 only; version 4.3.3 only; version 4.3.3.0095 only; …
• QNAP Quts Hero: before h4.5.1 (fixed in h4.5.1); version h4.5.1 only
• QNAP Qutscloud: before c4.5.3 (fixed in c4.5.3); version c4.5.3 only; version c4.5.4 only

Published 2021-04-16. Last modified 2026-06-17.