CVE-2021-34359 Stored XSS Vulnerability in Proxy Server
Remote attackers can inject malicious code via stored XSS in QNAP Proxy Server, potentially compromising user sessions or data.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2021-34359?
CVE-2021-34359 is a medium-severity cross-site scripting vulnerability in QNAP Systems Inc. Proxy Server, published on 25 Feb 2022. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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
Weakness: CWE-79
Which versions are affected by CVE-2021-34359?
It affects 1 product.
Products include Qnap Nas Proxy Server.
How do I fix CVE-2021-34359?
No fix has been published for CVE-2021-34359 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-34359 being exploited?
There is no known exploitation of CVE-2021-34359 in the wild and no public exploit code.
Other vulnerabilities in QNAP Systems Inc. Proxy Server
Sources
Also known as GHSA-2cm8-2mh8-q729.