What is CVE-2018-4445?

CVE-2018-4445 is a medium-severity vulnerability in Apple Iphone OS, classified under Information Disclosure. CVSS score: 4.3/10. Published 2019-04-03.

How severe is CVE-2018-4445?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Information disclosure in Apple Iphone OS

CVE-2018-4445

"Clear History and Website Data" did not clear the history. The issue was addressed with improved data deletion. This issue affected versions prior to iOS 12.1.1, Safari 12.0.2.

Vulnerability class: Information Disclosure

Published 2019-04-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (46.1th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 46.1% 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 Iphone OS
Apple Safari
iOS, Safari — versions Versions prior to: iOS 12.1.1, Safari 12.0.2

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

support.apple.com/kb/HT209340 (Vendor Advisory)
support.apple.com/kb/HT209344 (Vendor Advisory)

Frequently asked questions

What is CVE-2018-4445?: CVE-2018-4445 is a medium-severity vulnerability in Apple Iphone OS, classified under Information Disclosure. CVSS score: 4.3/10. Published 2019-04-03.
How severe is CVE-2018-4445?: Medium severity. CVSS v3 base score is 4.3 out of 10.