XSS in Apple Icloud

CVE-2018-4377

A cross-site scripting issue existed in Safari. This issue was addressed with improved URL validation. This issue affected versions prior to iOS 12.1, watchOS 5.1, Safari 12.0.1, iTunes 12.9.1, iCloud for Windows 7.8.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.012 (64.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2018-4377?
CVE-2018-4377 is a medium-severity vulnerability in Apple Icloud, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-04-03.
How severe is CVE-2018-4377?
Medium severity. CVSS v3 base score is 6.1 out of 10.