CVE-2023-32373
Published: May 22, 2023
Official Description
Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit contain a use-after-free 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.
CISA KEV Advisory
Apple Multiple Products WebKit Use-After-Free Vulnerability
Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari WebKit contain a use-after-free 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.
Apply updates per vendor instructions.
Risk Analysis
This vulnerability is a use-after-free flaw in WebKit, which can lead to arbitrary code execution when processing specially crafted web content. This is a high-severity issue, confirmed as exploited in the wild by CISA, indicating immediate attention is required despite a low EPSS score.
Active exploitation of this vulnerability has been observed in the wild, and it is listed in CISA's KEV catalog. Given the nature of WebKit, it is remotely exploitable through malicious web content.
Apply the latest security updates for Apple iOS, iPadOS, macOS, tvOS, watchOS, and Safari. Ensure all applications that rely on WebKit for HTML processing are also updated to their latest secure versions.
Technical Analysis
CVE-2023-32373 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2023-32373 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-32373 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1