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Fencer Intel
high 8.0

CVE-2018-19943 kev+ ransomware in the critical feed json

If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code.

published 6y ago modified 2mo ago also EUVD-2018-11614

cvss
8.0
version 3.1, CNA
cisa kev
Exploited
added 2022-05-24, used in ransomware
epss
22.7%
EPSS 22.7% chance of exploitation in 30 days, percentile 97%
public exploits
0
none known

Summary

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 20200421 and later

Patch / fix

cisa required action Apply updates per vendor instructions.

  • QNAP Systems Inc. QTS 4.2.6, 4.3.3.1252, 4.3.4.1282, 4.3.6.1263, 4.4.1.1261, 4.4.2.1270

Is CVE-2018-19943 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA SSVC: exploitation active
  4. CISA patch deadline

Known exploited

Added
4y ago
Patch by
2022-06-14 (4y ago)
Ransomware
Known to be used in ransomware campaigns
Required action
Apply updates per vendor instructions.
Vendor, product
QNAP, Network Attached Storage (NAS)
CISA name
QNAP NAS File Station Cross-Site Scripting Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
no
Technical impact
total
Assessed
4y ago

Exploit prediction

22.68% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 8.0 CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
NVD 3.1 5.4 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:N/I:P/A:N

Affected products

  • QNAP Systems Inc. QTS

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

Sources

Fencer Intel 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.