CVE-2021-21174: 
Node.js vulnerability analysis and mitigation

CVE-2021-21174 is a security vulnerability discovered in Google Chrome prior to version 89.0.4389.72. The vulnerability involves an inappropriate implementation in the Referrer component that allowed a remote attacker to bypass navigation restrictions through a crafted HTML page. The issue was reported by Jun Kokatsu (@shhnjk) on November 26, 2020 (Chrome Release).

The vulnerability has been assigned a CVSS v3.1 Base Score of 8.8 (High), with the following vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H. 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, while the potential impact on confidentiality, integrity, and availability is high (NVD).

The vulnerability could allow an attacker to bypass navigation restrictions in Google Chrome, potentially leading to unauthorized access to restricted content or functionality. The high CVSS score indicates significant potential impact on system confidentiality, integrity, and availability if successfully exploited (NVD).

The vulnerability was fixed in Google Chrome version 89.0.4389.72. Users and administrators are advised to upgrade to this version or later to mitigate the risk. The fix has been incorporated into various Linux distributions including Debian, Fedora, and Ubuntu through their respective security updates (Debian Security, Fedora Update).