What is CVE-2023-42923?

CVE-2023-42923 is a medium-severity vulnerability in Apple iOS And Ipados. CVSS score: 5.3/10. Published 2023-12-12.

How severe is CVE-2023-42923?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Apple iOS And Ipados

CVE-2023-42923

This issue was addressed through improved state management. This issue is fixed in iOS 17.2 and iPadOS 17.2. Private Browsing tabs may be accessed without authentication.

Published 2023-12-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (50.4th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Apple iOS And Ipados — versions unspecified
Apple Ipados
Apple Iphone OS

References

support.apple.com/en-us/HT214035 (Release Notes, Vendor Advisory)
seclists.org/fulldisclosure/2023/Dec/7 (Mailing List, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2023-42923?: CVE-2023-42923 is a medium-severity vulnerability in Apple iOS And Ipados. CVSS score: 5.3/10. Published 2023-12-12.
How severe is CVE-2023-42923?: Medium severity. CVSS v3 base score is 5.3 out of 10.