What is CVE-2018-19943?

CVE-2018-19943 is a high-severity vulnerability in Qnap Qts, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2020-10-28.

How severe is CVE-2018-19943?

High severity. CVSS v3 base score is 8.0 out of 10.

Is CVE-2018-19943 known to be exploited?

Yes. CVE-2018-19943 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

XSS in Qnap Qts

CVE-2018-19943

If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code. QNAP has already fixed these issues in the following QTS versions. QTS 4.4.2.1270 build 20200410 and later QTS 4.4.1.1261 build 20…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.177 (96.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.

Affected products

Qnap Qts — versions 4.2.6
Qnap Systems Inc. Qts — versions unspecified

Weakness classification (CWE)

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-05-24. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-06-14.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

security@qnapsecurity.com.tw (x_refsource_MISC, Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2018-19943?: CVE-2018-19943 is a high-severity vulnerability in Qnap Qts, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2020-10-28.
How severe is CVE-2018-19943?: High severity. CVSS v3 base score is 8.0 out of 10.
Is CVE-2018-19943 known to be exploited?: Yes. CVE-2018-19943 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-05-24), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.