CVE-2018-4303

Name: CVE-2018-4303
Creator: NVD / NIST
Published: 2019-04-03T18:29:06.063+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.92%

Last modified Jun 17, 2026

CVE-2018-4303 is a vulnerability of currently unknown severity. An input validation issue was addressed with improved input validation. This issue affected versions prior to macOS Mojave 10.14, iOS 12.1.1, macOS Mojave 10.14.2, tvOS 12.1.1, watchOS 5.1.2.. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

An input validation issue was addressed with improved input validation. This issue affected versions prior to macOS Mojave 10.14, iOS 12.1.1, macOS Mojave 10.14.2, tvOS 12.1.1, watchOS 5.1.2.

Metrics

EPSS Probability

0.92%

55.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Apple	Iphone Os	< 12.1.1
Apple	Mac Os X	< 10.14
Apple	Mac Os X	10.14.1
Apple	Tvos	< 12.1.1
Apple	Watchos	< 5.1.2

References

https://support.apple.com/kb/HT209340Vendor Advisory
https://support.apple.com/kb/HT209341Vendor Advisory
https://support.apple.com/kb/HT209342Vendor Advisory
https://support.apple.com/kb/HT209343Vendor Advisory
https://support.apple.com/kb/HT209340Vendor Advisory
https://support.apple.com/kb/HT209341Vendor Advisory
https://support.apple.com/kb/HT209342Vendor Advisory
https://support.apple.com/kb/HT209343Vendor Advisory

Timeline

Published: Apr 3, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-4303?

An input validation issue was addressed with improved input validation. This issue affected versions prior to macOS Mojave 10.14, iOS 12.1.1, macOS Mojave 10.14.2, tvOS 12.1.1, watchOS 5.1.2.

How severe is CVE-2018-4303?

Severity scoring for CVE-2018-4303 is pending analysis. The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2018-4303?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-4303?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST