CVE-2018-4133

Severity: medium (CVSS 6.1 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-04-03 · updated 2026-06-17
Weakness: CWE-79

Description

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: 16.04, 17.10
Webkitgtk+: before 2.20.4 — fixed in 2.20.4

How to fix

Upgrade to a fixed version: Apple Safari 11.1; Webkitgtk+ 2.20.4. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/103580
http://www.securitytracker.com/id/1040606
https://security.gentoo.org/glsa/201808-04
https://support.apple.com/HT208695
https://usn.ubuntu.com/3635-1/
http://www.securityfocus.com/bid/103580
http://www.securitytracker.com/id/1040606
https://security.gentoo.org/glsa/201808-04
https://support.apple.com/HT208695
https://usn.ubuntu.com/3635-1/

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