CVE-2018-19943
Published: May 24, 2022
Official Description
A cross-site scripting vulnerability affecting QNAP NAS File Station could allow remote attackers to inject malicious code.
CISA KEV Advisory
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.
Apply updates per vendor instructions.
Risk Analysis
A cross-site scripting vulnerability in QNAP NAS File Station allows remote attackers to inject malicious code. The high EPSS score of 0.05500 indicates a significant likelihood of exploitation, and its inclusion in CISA's KEV confirms it has been actively exploited.
This vulnerability is actively being exploited in the wild. Exploitation is remote and involves injecting malicious code.
Users of QNAP NAS File Station should apply the latest security updates and patches. Additionally, implement strong web application security practices, including input validation and output encoding.
Technical Analysis
CVE-2018-19943 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2018-19943 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Exploit & PoC Resources
All References (1)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2018-19943 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1