CVE-2021-30583: 
vulnerability analysis and mitigation

CVE-2021-30583 is a security vulnerability identified in Google Chrome for iOS prior to version 92.0.4515.107. The vulnerability stems from insufficient policy enforcement in image handling, which could allow a remote attacker to leak cross-origin data through a crafted HTML page (NVD, CVE).

The vulnerability has been assigned a CVSS v3.1 Base Score of 6.5 (Medium), with a vector string of 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 impact primarily affects confidentiality, with no impact on integrity or availability (NVD).

The vulnerability allows an attacker to potentially leak cross-origin data when a user interacts with a specially crafted HTML page. This represents a significant confidentiality breach as it could expose sensitive information from different origins (NVD).

The vulnerability has been patched in Google Chrome for iOS version 92.0.4515.107. Users are advised to update their browsers to this version or later to mitigate the risk (Chrome Release).