CVE-2023-49093: Htmlunit

High severity, CVSS 8.8. EPSS: 2.4% chance of exploitation in the next 30 days.

HtmlUnit is a GUI-less browser for Java programs. HtmlUnit is vulnerable to Remote Code Execution (RCE) via XSTL, when browsing the attacker’s webpage. This vulnerability has been patched in version 3.9.0

Affected products

• Htmlunit Htmlunit: before 3.9.0 (fixed in 3.9.0)

Published 2023-12-04. Last modified 2026-06-17.