title: Stored XSS Vulnerability in Proxy Server
description: A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running Proxy Server. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of Proxy Server: QTS 4.5.x: Proxy Server 1.4.2 ( 2021/12/30 ) and later
problem types: CWE-79 Cross-site Scripting (XSS)
affected:
{
platforms: QTS 4.5.x
product: Proxy Server
vendor: QNAP Systems Inc.
versions:
lessThan: 1.4.2 ( 2021/12/30 ), status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 6.9
baseSeverity: MEDIUM
confidentialityImpact: HIGH
integrityImpact: LOW
privilegesRequired: HIGH
scope: CHANGED
userInteraction: REQUIRED
vectorString: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:L/A:N
version: 3.1
]
solutions: We have already fixed this vulnerability in the following versions of Proxy Server:
QTS 4.5.x: Proxy Server 1.4.2 ( 2021/12/30 ) and later