CVE-2025-30425: 
Apple Safari vulnerability analysis and mitigation

CVE-2025-30425 is a security vulnerability affecting Safari's private browsing mode, discovered and reported by an anonymous researcher. The vulnerability was disclosed on March 31, 2025, and affects multiple Apple operating systems including tvOS 18.4, Safari 18.4, iPadOS 17.7.6, iOS 18.4, iPadOS 18.4, and macOS Sequoia 15.4. The issue allows malicious websites to potentially track users while using Safari's private browsing mode (Apple Security, NVD).

The vulnerability stems from a state management issue in WebKit, Apple's browser engine. The issue was tracked as WebKit Bugzilla: 286580 and received a CVSS 3.1 Base Score of 4.3 (MEDIUM) with a vector string of CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N. The vulnerability is classified under CWE-284 (Improper Access Control) (NVD).

The vulnerability allows malicious websites to track users' browsing activity even when using Safari's private browsing mode, potentially compromising user privacy and anonymity. This breaks the core functionality of private browsing, which is designed to prevent websites from tracking user activity (Apple Security).

Apple has addressed this vulnerability through improved state management in the following software updates: tvOS 18.4, Safari 18.4, iPadOS 17.7.6, iOS 18.4 and iPadOS 18.4, and macOS Sequoia 15.4. Users are advised to update their devices to these versions to protect against potential exploitation (Apple Security, NVD).