CVE-2021-34359

MediumCVSS 5.4/10Last modified Jun 17, 2026

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

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

Vendor	Product	Versions
QNAP Systems Inc.	Proxy Server	>= unspecified, < 1.4.2 ( 2021/12/30 )

References

https://www.qnap.com/en/security-advisory/qsa-22-04Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-22-04Vendor Advisory

Timeline

Published: Feb 25, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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