Cross-site scripting in QNAP Systems, Inc. products - CVE-2021-38674
Published: January 7, 2022
Vulnerability identifier: #VU59282
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2021-38674
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data in the TFTP Server. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
QuTScloud
QuTS hero
QNAP QTS
QuTS hero
QNAP QTS
How to mitigate CVE-2021-38674
Install update from vendor's website.
QuTScloud - update to c4.5.7.1864
QuTS hero - update to h4.5.4.1771 build 20210825
QNAP QTS - update to 4.5.4.1787 20210910
QuTS hero - update to h4.5.4.1771 build 20210825
QNAP QTS - update to 4.5.4.1787 20210910