Overview
Apple iOS, iPadOS, macOS, and Safari WebKit contain a memory corruption 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.
https://support.apple.com/en-us/HT214031, https://support.apple.com/en-us/HT214032, https://support.apple.com/en-us/HT214033 ; https://nvd.nist.gov/vuln/detail/CVE-2023-42917
Key Details
| Property | Value |
|---|---|
| CVE ID | CVE-2023-42917 |
| Vendor / Product | Apple — Multiple Products |
| NVD Published | 2023-11-30 |
| NVD Last Modified | 2025-10-23 |
| CVSS 3.1 Score | 8.8 |
| CVSS 3.1 Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| Severity | HIGH |
| CWE | CWE-787 |
| CISA KEV Added | 2023-12-04 |
| CISA KEV Deadline | 2023-12-25 |
| Known Ransomware Use | No |
CVSS 3.1 Breakdown
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Required Action
CISA BOD 22-01 Deadline: 2023-12-25.
Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Timeline
| Date | Event |
|---|---|
| 2023-12-04 | Added to CISA Known Exploited Vulnerabilities catalog |
| 2023-12-25 | CISA BOD 22-01 remediation deadline |
References
| Resource | Type |
|---|---|
| NVD — CVE-2023-42917 | Vulnerability Database |
| CISA KEV Catalog Entry | US Government |