Cross-site Scripting Vulnerability in File Station

published 2021-04-16 5 y ago modified 2026-06-17 4 mo ago also EUVD-2018-11613

cvss: 6.1; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.8%; EPSS 0.8% chance of exploitation in 30 days, percentile 55%
public exploits: 0; none known

A cross-site scripting (XSS) vulnerability has been reported to affect earlier versions of File Station. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 build 20210202 (and later) QTS 4.5.1.1456 build 20201015 (and later) QTS 4.3.6.1446 build 20200929 (and later) QTS 4.3.4.1463 build 20201006 (and later) QTS 4.3.3.1432 build 20201006 (and later) QTS 4.2.6 build 20210327 (and later) QuTS hero h4.5.1.1472 build 20201031 (and later) QuTScloud c4.5.4.1601 build 20210309 (and later) QuTScloud c4.5.3.1454 build 20201013 (and later)

Patch / fix

fixed in 3

QNAP Systems Inc. QTS 4.2.6 build 20210327, 4.3.3.1432 build 20201006, 4.3.4.1463 build 20201006, 4.3.6.1446 build 20200929, 4.5.1.1456 build 20201015, 4.5.2.1566 build 20210202
QNAP Systems Inc. QuTS hero h4.5.1.1472 build 20201031
QNAP Systems Inc. QuTScloud c4.5.3.1454 build 20201013, c4.5.4.1601 build 20210309

Exploit prediction

0.77% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
NVD	3.1	6.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:P/A:N

Affected products

QNAP Systems Inc. QTS
QNAP Systems Inc. QuTS hero
QNAP Systems Inc. QuTScloud

Classification

Weakness

CWE-79 Improper Neutralization of Input During Web Page Generation
CWE-80 Improper Neutralization of Script-Related HTML Tags in a Web Page

References

qnap.com /zh-tw/security-advisory/qsa-21-04
vendor-advisory

Sources

CVE List CVE-2018-19942
NVD CVE-2018-19942

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary