What is CVE-2019-8674?

CVE-2019-8674 is a medium-severity vulnerability in Apple iOS, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-12-18.

How severe is CVE-2019-8674?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Apple iOS

CVE-2019-8674

A logic issue was addressed with improved state management. This issue is fixed in iOS 13, Safari 13. Processing maliciously crafted web content may lead to universal cross site scripting.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-12-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.010 (61.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Apple iOS — versions unspecified
Apple Iphone OS
Apple Safari — versions unspecified
Webkitgtk

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

support.apple.com/HT210606 (Vendor Advisory)
support.apple.com/HT210608 (Vendor Advisory)
security.gentoo.org/glsa/202003-22 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2019-8674?: CVE-2019-8674 is a medium-severity vulnerability in Apple iOS, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2019-12-18.
How severe is CVE-2019-8674?: Medium severity. CVSS v3 base score is 6.1 out of 10.