CVE-2020-36194: XSS Vulnerability in QTS and QuTS heroCommand Injection Vulnerabilities in QTS and QuTS hero

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-07-01 · updated 2026-06-17
Weakness: CWE-79

Description

An XSS vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to inject malicious code. This issue affects: QNAP Systems Inc. QTS versions prior to 4.5.2.1566 Build 20210202. QNAP Systems Inc. QuTS hero versions prior to h4.5.2.1638 build 20210414. This issue does not affect: QNAP Systems Inc. QTS 4.5.3.

Affected products

QNAP QTS: before 4.5.2.1566 — fixed in 4.5.2.1566
QNAP Systems Inc. QuTS hero: before h4.5.2.1638 — fixed in h4.5.2.1638

How to fix

Upgrade to a fixed version: QNAP QTS 4.5.2.1566; QNAP Systems Inc. QuTS hero h4.5.2.1638. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2020-36194 or the next vulnerability affects your stack