CVE-2018-19953
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
This cross-site scripting (XSS) vulnerability in QNAP NAS File Station allows remote attackers to inject malicious code. Its inclusion in the KEV catalog and an EPSS score of 0.31524 indicate a high likelihood of exploitation, making it an urgent concern for QNAP NAS users.
This vulnerability is actively exploited in the wild, as confirmed by its presence in the KEV catalog. Attackers are leveraging this flaw to inject malicious code remotely.
Update QNAP NAS File Station to the latest secure version to patch this cross-site scripting vulnerability. Implement web application firewall (WAF) rules to filter malicious input and protect against XSS attacks.
Technical Analysis
CVE-2018-19953 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-2018-19953 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-2018-19953 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