Advisory Details

July 29th, 2025

Apple Safari JavascriptCore WasmToJSException Type Confusion Remote Code Execution Vulnerability

ZDI-25-709
ZDI-CAN-27217

CVE ID CVE-2025-43214
CVSS SCORE 8.8, AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
AFFECTED VENDORS Apple
AFFECTED PRODUCTS Safari
VULNERABILITY DETAILS

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Apple Safari. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the handling of the WasmToJSException operation. By performing actions in JavaScript, an attacker can trigger a type confusion condition. An attacker can leverage this vulnerability to execute code in the context of the current process.

ADDITIONAL DETAILS Apple has issued an update to correct this vulnerability. More details can be found at:
https://support.apple.com/en-us/124149
DISCLOSURE TIMELINE
  • 2025-06-10 - Vulnerability reported to vendor
  • 2025-07-29 - Coordinated public release of advisory
  • 2025-07-29 - Advisory Updated
CREDIT shandikri
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