What is CVE-2019-8505?

CVE-2019-8505 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-2019-8505?

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

XSS in Apple iOS

CVE-2019-8505

A logic issue was addressed with improved validation. This issue is fixed in iOS 12.2, Safari 12.1. Enabling the Safari Reader feature on a maliciously crafted webpage 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: 0.006 (49.3th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

support.apple.com/HT209599 (Vendor Advisory)
support.apple.com/HT209603 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-8505?: CVE-2019-8505 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-2019-8505?: Medium severity. CVSS v3 base score is 6.1 out of 10.