Cross-site scripting in QNAP Q'center

1) Cross-site scripting

EUVDB-ID: #VU53762

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28807

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

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. A remote authenticated 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.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Q’center: before 1.10.1004

QNAP QTS: before

QuTS hero: before h4.5.2

QuTScloud: before c4.5.4

CPE2.3

• cpe:2.3:a:qnap_systems:q’center:*:*:*:*:*:*:*:*
• cpe:2.3:a:qnap_systems:qnap_qts:*:*:*:*:*:*:*:*
• cpe:2.3:h:qnap_systems:quts-hero:*:*:*:*:*:*:*:*
• cpe:2.3:o:qnap_systems:qutscloud:*:*:*:*:*:*:*:*

External links

https://www.qnap.com/zh-tw/security-advisory/qsa-21-20

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.