[KEV] Cross-Site Scripting (XSS) in QNAP Network Attached Storage (NAS) (CVE-2018-19943)
Summary
Cross-site scripting in QNAP Network Attached Storage (NAS) (CVE-2018-19943). Successful exploitation can lead to full system takeover. Listed in CISA KEV — actively exploited.
Original description
The description as published by the source.
A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code.
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2018-19943 has been found in QNAP Network Attached Storage (NAS).
Successful exploitation can lead to full system takeover. CVSS score: 8.0/10.
Note: CISA has officially confirmed this is actively exploited in the wild. Treat it with elevated urgency.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "QNAP Network Attached Storage (NAS) CVE-2018-19943" on the vendor's site.
CVE-2018-19943 (QNAP Network Attached Storage (NAS)) — CWE-79 / CVSS v3 8.0
Attack vector: remote (network-reachable)
Listed in CISA KEV — actively exploited, treat as top priority.
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Cross-site scripting (XSS) (CWE-79) exists in QNAP Network Attached Storage (NAS).
Check the vendor advisory for the affected versions of QNAP Network Attached Storage (NAS).
Severity: High (CVSS 8.0/10). Successful exploitation can lead to full system takeover. Listed in CISA KEV — actively exploited in the wild, treat as top priority.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで QNAP Network Attached Storage (NAS) を使っているサービスとバージョンを洗い出す。
-
2Consider incident declaration escalate
Notify SOC / on-callCISA KEV登録済 = 実環境で悪用が観測されている。侵入の兆候があればインシデント対応宣言、無くてもパッチ適用までWAF強化を最優先で。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。