CVE-2020-6566: 
Google Chrome vulnerability analysis and mitigation

CVE-2020-6566 is a security vulnerability discovered in Google Chrome versions prior to 85.0.4183.83. The vulnerability stems from insufficient policy enforcement in the media component of the browser, which could allow a remote attacker to leak cross-origin data through a specially crafted HTML page (Chrome Blog, NVD).

The vulnerability has been assigned a CVSS v3.1 Base Score of 6.5 (Medium), with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. This indicates that the vulnerability can be exploited remotely, requires low attack complexity, needs no privileges, but does require user interaction. The scope is unchanged, with high impact on confidentiality but no impact on integrity or availability (NVD).

The primary impact of this vulnerability is the potential leakage of cross-origin data. When successfully exploited, an attacker could access data from different origins through a specially crafted HTML page, potentially compromising sensitive information (NVD).

The vulnerability requires user interaction to be exploited, typically through visiting a maliciously crafted webpage. The attack vector is network-based, meaning it can be exploited remotely, and requires low attack complexity (NVD).

The vulnerability was patched in Google Chrome version 85.0.4183.83. Users and organizations are advised to upgrade to this version or later to mitigate the risk. The fix was also distributed to various Linux distributions including Debian, Fedora, and OpenSUSE through their respective security updates (Chrome Blog, Debian Security).