CVE-2018-18940
CWE-79Published: January 31, 2019· Updated: Jun 17, 2026
Official Description
servlet/SnoopServlet (a servlet installed by default) in Netscape Enterprise 3.63 has reflected XSS via an arbitrary parameter=[XSS] in the query string. A remote unauthenticated attacker could potentially exploit this vulnerability to supply malicious HTML or JavaScript code to a vulnerable web application, which is then reflected back to the victim and executed by the web browser. NOTE: this product is discontinued.
Technical Analysis
CVE-2018-18940 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-2018-18940 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts