CVE-2023-3840
CWE-79Published: July 23, 2023· Updated: Jun 17, 2026
Official Description
A vulnerability, which was classified as problematic, was found in NxFilter 4.3.2.5. This affects an unknown part of the file /report,daily.jsp?stime=2023%2F07%2F12&timeOption=yesterday&. The manipulation of the argument user leads to cross site scripting. It is possible to initiate the attack remotely. The associated identifier of this vulnerability is VDB-235191. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Technical Analysis
CVE-2023-3840 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.
The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.
From a weakness classification perspective (CWE-79): Cross-site scripting (XSS) vulnerabilities allow attackers to inject malicious scripts into web pages viewed by other users.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (4)
Quick Facts
Related CVEs (CWE-79)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-3840 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts