CVE-2018-19942 — Cross-site Scripting Vulnerability in File Station

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MEDIUM

Cross-site Scripting Vulnerability in File Station

Published Apr 16, 2021

6.1

MEDIUM

CVSS 3.1

EPSS 0.75%

Description

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)

Affected products

Vendor QNAP Systems Inc. Product QTS Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <4.2.6 build 20210327
- Version
  unspecified
  Status
  affected
  Constraints
  <4.3.3.1432 build 20201006
- Version
  unspecified
  Status
  affected
  Constraints
  <4.3.4.1463 build 20201006
- Version
  unspecified
  Status
  affected
  Constraints
  <4.3.6.1446 build 20200929
- Version
  unspecified
  Status
  affected
  Constraints
  <4.5.1.1456 build 20201015
- Version
  unspecified
  Status
  affected
  Constraints
  <4.5.2.1566 build 20210202
Vendor QNAP Systems Inc. Product QuTS hero Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <h4.5.1.1472 build 20201031
Vendor QNAP Systems Inc. Product QuTScloud Default
n/a
- Version
  unspecified
  Status
  affected
  Constraints
  <c4.5.3.1454 build 20201013
- Version
  unspecified
  Status
  affected
  Constraints
  <c4.5.4.1601 build 20210309

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

QNAP Systems Inc.

QTS

n/a

Version	Status	Constraints
unspecified	affected	<4.2.6 build 20210327
unspecified	affected	<4.3.3.1432 build 20201006
unspecified	affected	<4.3.4.1463 build 20201006
unspecified	affected	<4.3.6.1446 build 20200929
unspecified	affected	<4.5.1.1456 build 20201015
unspecified	affected	<4.5.2.1566 build 20210202

QNAP Systems Inc.

QuTS hero

n/a

Version	Status	Constraints
unspecified	affected	<h4.5.1.1472 build 20201031

QNAP Systems Inc.

QuTScloud

n/a

Version	Status	Constraints
unspecified	affected	<c4.5.3.1454 build 20201013
unspecified	affected	<c4.5.4.1601 build 20210309

Remediation

No remediation recorded yet.

Metrics

0.75% 0.00746

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00746

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.75% (0.00746)	53.14th	v5 (v2026.06.15)
Sep 20, 2026	0.75% (0.00746)	53.33th	v5 (v2026.06.15)
Jul 20, 2024	0.11% (0.00115)	45.62th	v3 (v2023.03.01)
Dec 30, 2023	0.11% (0.00112)	44.41th	v3 (v2023.03.01)
Nov 20, 2023	0.10% (0.00105)	42.78th	v3 (v2023.03.01)
Mar 7, 2023	0.10% (0.00104)	40.73th	v3 (v2023.03.01)
Mar 6, 2023	1.05% (0.01055)	52.13th	v2 (v2022.01.01)
Feb 4, 2022	1.05% (0.01055)	27.52th	v2 (v2022.01.01)
Feb 3, 2022	0.52% (0.00523)	12.55th	v5 (v2026.06.15)
Apr 16, 2021	0.52% (0.00523)	0.00th	v1