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CVE-2018-19953

QNAP NAS File Station Cross-Site Scripting

6.1 MEDIUMActively exploited (CISA KEV)Used in ransomwareEPSS 29.0%
  1. Published28 Oct 2020
  2. Added to CISA KEV24 May 2022
  3. Remediation due14 Jun 2022
Actively exploited (CISA KEV)

A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code.

Added to KEV: 24 May 2022Federal remediation due: 14 Jun 2022Used in ransomware

Description

If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityLow
IntegrityLow
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Affected products

QNAP Qts≥ 4.3.1.0013 < 4.3.3.1161 · ≥ 4.3.4 < 4.3.4.1190 · ≥ 4.3.6 < 4.3.6.1218 · ≥ 4.4.0 < 4.4.1.1201

Remediation

Fixed in
QNAP Qts≥ 4.3.3.1161

References

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Frequently asked

Is CVE-2018-19953 being actively exploited?

Yes. CVE-2018-19953 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 24 May 2022. It has been used in ransomware campaigns.

How severe is CVE-2018-19953?

CVE-2018-19953 has a CVSS 3.1 base score of 6.1, rated medium. EPSS estimates a 29.0% probability of exploitation.

Which products are affected by CVE-2018-19953?

Affected products include QNAP Qts.

How do I fix CVE-2018-19953?

Upgrade affected software to a fixed version, for example QNAP Qts 4.3.3.1161 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2018-19953 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.