Vulnerability

CVE-2018-19943

High· 8.0KEVCVSS8EPSS7%

.rules3/5

QNAP NAS File Station Cross-Site Scripting Vulnerability

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

Threat signal

91/100

Severe

Severity

high

CVSS

8.0

EPSS

Active

KEV

CISA KEV — actively exploited

Ransomware: Known1460d overdue

AffectedQNAP — Network Attached Storage (NAS)

Added to KEV

2022-05-24

Federal patch due (BOD 22-01)

2022-06-14

Required action (CISA verbatim)

Apply updates per vendor instructions.

Vendor advisory + references

https://nvd.nist.gov/vuln/detail/CVE-2018-19943

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

CVSS

v3.1Open in FIRST calculator →

8.0/ 10HIGHCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityHighRequires conditions outside attacker's control (race, brute-force, configuration
Privileges RequiredLowStandard user privileges sufficient.
User InteractionRequiredRequires user action (click, file open, etc).
ScopeChangedImpact extends beyond the vulnerable component (e.g. sandbox escape).
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

7.03%

probability of exploitation in next 30 days

p92

higher than 92% of all CVEs

3-day trend↑ 0pp

Mid-pack — moderate exploitation likelihood.

Vendor VEX

No VEX statements published for CVE-2018-19943. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAct

Active exploitation with total impact on essential/support systems

exploitation: active
automatable: yes
impact: total
mission: support

Lifecycle

2022-05-24Added to CISA KEVransomware: Known
2022-05-24Published
2022-06-14Federal patch due (BOD 22-01)
2026-06-12Last modified1 source

No source-event history recorded yet. New revisions will appear here as ingestors re-fetch this CVE.