CVE-2025-30457: 
macOS vulnerability analysis and mitigation

CVE-2025-30457 is a security vulnerability affecting macOS operating systems that was disclosed on March 31, 2025. The vulnerability allows a malicious app to create symlinks to protected regions of the disk. This issue affects multiple versions of macOS including macOS Ventura (up to 13.7.5), macOS Sonoma (up to 14.7.5), and macOS Sequoia (up to 15.4). The vulnerability was discovered by security researcher Mickey Jin (@patch1t) (Apple Advisory).

The vulnerability is classified as a symlink validation issue in the SystemMigration component of macOS. The issue stems from improper validation of symlinks, which could allow unauthorized access to protected disk regions. The vulnerability has been assigned a CVSS v3.1 base score of 9.8 (CRITICAL) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H, indicating a high-severity issue with potential for complete system compromise (NVD).

The vulnerability allows a malicious application to create symbolic links to protected regions of the disk, potentially leading to unauthorized access to sensitive system areas. This could result in data exposure, system manipulation, or privilege escalation (Apple Advisory, CVE).

Apple has addressed this vulnerability by improving the validation of symlinks in macOS Ventura 13.7.5, macOS Sequoia 15.4, and macOS Sonoma 14.7.5. Users are advised to update their systems to these patched versions to mitigate the risk (Apple Advisory).