PatchSiren

PatchSiren cyber security CVE debrief

CVE-2023-23529 Apple CVE debrief

CVE-2023-23529 is an Apple WebKit type confusion vulnerability affecting multiple products. CISA added it to the Known Exploited Vulnerabilities catalog on 2023-02-14, signaling that defenders should treat it as a priority patching item. The KEV entry points organizations to Apple vendor guidance and requires prompt update deployment.

Vendor
Apple
Product
Multiple Products
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2023-02-14
Original CVE updated
2023-02-14
Advisory published
2023-02-14
Advisory updated
2023-02-14

Who should care

Apple device administrators, endpoint security teams, and anyone responsible for managing Apple products that include WebKit should prioritize this issue because CISA lists it as known exploited.

Technical summary

The source corpus describes the issue as a type confusion vulnerability in WebKit across Apple multiple products. No CVSS score is provided in the supplied material, but the CISA KEV listing indicates the flaw has been observed as exploited and should be remediated through vendor updates.

Defensive priority

High — CISA added this CVE to the KEV catalog on the publication date, and the remediation due date was 2023-03-07.

Recommended defensive actions

  • Apply the relevant Apple security updates per vendor instructions and the linked Apple advisories referenced by CISA.
  • Verify patch compliance across all managed Apple endpoints and any products that depend on WebKit components.
  • Prioritize remediation for exposed, unmanaged, or high-value devices first.
  • Confirm no systems remain on versions covered by the KEV entry after update deployment.

Evidence notes

CISA’s KEV metadata identifies the vulnerability as "Apple Multiple Products WebKit Type Confusion Vulnerability," marks it as known exploited, and sets a required action to apply updates per vendor instructions. The source notes reference Apple support advisories HT213635, HT213633, and HT213638, alongside the official CVE record and NVD entry.

Official resources

Publicly disclosed on 2023-02-14 and added to CISA’s Known Exploited Vulnerabilities catalog the same day.