CVE-2025-43229: 
Apple Safari vulnerability analysis and mitigation

A universal cross-site scripting vulnerability (CVE-2025-43229) was discovered affecting Apple's macOS Sequoia and Safari browser. The vulnerability was disclosed on July 29, 2025, and was identified by Martin Bajanik of Fingerprint and Ammar Askar. The issue affects macOS Sequoia versions prior to 15.6 and Safari versions before 18.6 (Apple Support, NVD).

The vulnerability stems from a state management issue in WebKit, Apple's browser engine. When processing maliciously crafted web content, the flaw could lead to universal cross-site scripting (WebKit Bugzilla: 285927). The vulnerability has been assigned a CVSS v3.1 base score of 6.1 (MEDIUM), with the following vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. This indicates that the vulnerability is network-accessible, requires low attack complexity, needs no privileges, but does require user interaction (CISA-ADP).

The vulnerability allows attackers to perform universal cross-site scripting attacks through maliciously crafted web content. This could potentially lead to unauthorized access to sensitive user information and compromise of web browser security mechanisms (Apple Support).

Apple has addressed this vulnerability by improving state management in the affected software. Users are advised to update to macOS Sequoia 15.6 and Safari 18.6 or later versions to protect against this security issue (Apple Support).