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CVE-2023-23529

Apple Multiple Products WebKit Type Confusion

8.8 HIGHActively exploited (CISA KEV)EPSS 9.50%
  1. Published27 Feb 2023
  2. Added to CISA KEV14 Feb 2023
  3. Remediation due7 Mar 2023
Actively exploited (CISA KEV)

Apple iOS, MacOS, Safari and iPadOS WebKit contain a type confusion vulnerability that leads to code execution when processing maliciously crafted web content. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Added to KEV: 14 Feb 2023Federal remediation due: 7 Mar 2023

Description

A type confusion issue was addressed with improved checks. This issue is fixed in iOS 15.7.4 and iPadOS 15.7.4, iOS 16.3.1 and iPadOS 16.3.1, macOS Ventura 13.2.1, Safari 16.3. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been actively exploited.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Apple Safari< 16.3
Apple iPadOS≥ 16.0 < 16.3.1 · < 15.7.4
Apple iPhone OS≥ 16.0 < 16.3.1 · < 15.7.4
Apple macOS≥ 13.0 < 13.2.1

Remediation

Fixed in
Apple Safari≥ 16.3
Apple iPadOS≥ 16.3.1
Apple iPhone OS≥ 16.3.1
Apple macOS≥ 13.2.1

References

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Frequently asked

Is CVE-2023-23529 being actively exploited?

Yes. CVE-2023-23529 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 14 Feb 2023.

How severe is CVE-2023-23529?

CVE-2023-23529 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 9.50% probability of exploitation.

Which products are affected by CVE-2023-23529?

Affected products include Apple Safari, Apple iPadOS, Apple iPhone OS, Apple macOS.

How do I fix CVE-2023-23529?

Upgrade affected software to a fixed version, for example Apple Safari 16.3, Apple iPadOS 16.3.1, Apple iPhone OS 16.3.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-23529 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.