CVE-2025-30466: 
Apple Safari vulnerability analysis and mitigation

CVE-2025-30466 is a security vulnerability affecting Apple Safari and related operating systems (Safari 18.4, iOS 18.4, iPadOS 18.4, visionOS 2.4, and macOS Sequoia 15.4) that was discovered by Jaydev Ahire and @RenwaX23. The vulnerability was publicly disclosed on May 28, 2025, and allows a website to bypass Same Origin Policy (Apple Support, Wiz).

The vulnerability stems from a state management issue in Safari's handling of web content. It has been assigned a CVSS v3.1 base score of 9.8 (CRITICAL) with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating a highly severe vulnerability that can be exploited remotely without requiring privileges or user interaction (Wiz, Rapid7).

The vulnerability allows malicious websites to bypass the Same Origin Policy, a fundamental security mechanism that prevents websites from accessing data from other domains. This could potentially lead to cross-site scripting attacks, data theft, and unauthorized access to sensitive information from other websites (Apple Support, Wiz).

Apple has addressed this vulnerability through improved state management in Safari 18.4, iOS 18.4, iPadOS 18.4, visionOS 2.4, and macOS Sequoia 15.4. Users are strongly advised to update their systems to these versions to protect against potential exploitation (Apple Support, NVD).