CVE-2021-28807 Post-Authentication Reflected XSS Vulnerability in Q'center

High 7.7 Published 3 Jun 2021 Updated 16 Sep 2024

Remote attackers can inject malicious scripts into QNAP NAS Q'center via reflected XSS, potentially leading to code execution or account takeover.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-28807?

CVE-2021-28807 is a high-severity cross-site scripting vulnerability in QNAP Systems Inc. Q’center, published on 3 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A post-authentication reflected XSS vulnerability has been reported to affect QNAP NAS running Q’center. If exploited, this vulnerability allows remote attackers to inject malicious code. QNAP have already fixed this vulnerability in the following versions of Q’center: QTS 4.5.3: Q’center v1.12.1012 and later QTS 4.3.6: Q’center v1.10.1004 and later QTS 4.3.3: Q’center v1.10.1004 and later QuTS hero h4.5.2: Q’center v1.12.1012 and later QuTScloud c4.5.4: Q’center v1.12.1012 and later

Weakness: CWE-79

Which versions are affected by CVE-2021-28807?

It affects 1 product.

Products include Qnap Q\'center.

How do I fix CVE-2021-28807?

No fix has been published for CVE-2021-28807 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-2021-28807 being exploited?

There is no known exploitation of CVE-2021-28807 in the wild and no public exploit code.

Sources

Also known as GHSA-4g4m-4574-88xm.