SARA / Free Tools / CVE / CVE-2018-19943

CVE-2018-19943 — QNAP NAS File Station Cross-Site Scripting Vulnerability

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 20200330 and later QTS 4.3.6.1263 build 202

CVSS
8.0 HIGH
EPSS
5.50% (top 9.90%)
CWE
CWE-79, CWE-80
Published
2020-10-28T17:55:18.000Z
Last modified
2025-10-21T23:35:34.195Z
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
CISA KEV — Actively Exploited
Added to KEV
2022-05-24
BOD 22-01 due
2022-06-14
Ransomware use
Known

01What is this vulnerability?

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 20200330 and later QTS 4.3.6.1263 build 20200330 and later QTS 4.3.4.1282 build 20200408 and later QTS 4.3.3.1252 build 20200409 and later QTS 4.2.6 build…

02Affected products

VendorProductVersions
QNAP Systems Inc.QTSunspecified
QNAP Systems Inc.QTSunspecified, unspecified
QNAP Systems Inc.QTSunspecified
QNAP Systems Inc.QTSunspecified
QNAP Systems Inc.QTSunspecified

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2022-05-24. Ransomware use: Known.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

Want this in your SOAR or SIEM?
SARA's API returns EPSS, CVSS, KEV, and an analyst-grade summary in one call.
Read the API reference →