Qnap Security Advisory | Bulletin ID: QSA-22-04

Qnap Systems, Inc. had published security enhancement against security vulnerabilities that could affect specific versions of the company’s products.

Use following information and solutions to correct the security issues and vulnerabilities.

XSS vulnerabilities in Proxy Server
Release date: February 25, 2022 
Security ID: QSA-22-04 
Severity: Medium 
CVE identifier: CVE-2021-34359 | CVE-2021-34361 
Affected products: Qnap NAS running Proxy Server

Summary
Cross-site scripting (XSS) vulnerabilities have been reported to affect Qnap NAS running Proxy Server. If exploited, this vulnerability allows remote attackers to inject malicious code.

The company 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

Recommendation
To fix the vulnerabilities, Qnap recommend updating Proxy Server to the latest version.

Updating Proxy Server

1. Log on to QTS as administrator.

2. Open the App Center and then click on
   A search box appears.

3. Enter ‘Proxy Server’. 
   Proxy Server appears in the search results.

4. Click Update. 
   A confirmation message appears. 
   Note: The Update button is not available if your application is already up to date.

5. Click OK. 
   The application is updated.

Acknowledgements: Tony Martin, a security researcher 
Revision history: V1.0 (February 25, 2022) – Published

Contact questions regarding this issue