CVE-2018-4133: Apple Safari

Medium severity, CVSS 6.1. EPSS: 1.5% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. Safari before 11.1 is affected. The issue involves the "WebKit" component. A Safari cross-site scripting (XSS) vulnerability allows remote attackers to inject arbitrary web script or HTML via a crafted URL.

Affected products

• Apple Safari: before 11.1 (fixed in 11.1)
• Canonical Ubuntu Linux: version 16.04 only; version 17.10 only
• WebKitGTK Webkitgtk+: before 2.20.4 (fixed in 2.20.4)

Published 2018-04-03. Last modified 2026-06-17.