CVE-2021-30795: 
Apple Safari vulnerability analysis and mitigation

CVE-2021-30795 is a use-after-free vulnerability in WebKit that affects multiple Apple products including iOS 14.7, Safari 14.1.2, macOS Big Sur 11.5, watchOS 7.6, and tvOS 14.7. The vulnerability was discovered by Sergei Glazunov of Google Project Zero and was fixed in July 2021. Processing maliciously crafted web content may lead to arbitrary code execution (Apple Support, NVD).

The vulnerability is classified as a use-after-free issue in WebKit, Apple's browser engine. The issue was addressed with improved memory management. The vulnerability has a CVSS v3.1 base score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating a high severity issue with network attack vector, low attack complexity, and requiring user interaction (NVD).

When successfully exploited, this vulnerability could allow an attacker to execute arbitrary code on the target system through processing maliciously crafted web content. This could potentially lead to complete system compromise within the context of the affected WebKit component (Apple Support).

Apple has released security updates to address this vulnerability in multiple products: iOS 14.7, Safari 14.1.2, macOS Big Sur 11.5, watchOS 7.6, and tvOS 14.7. Users are advised to update their devices to these versions or later to mitigate the risk (Apple Support).