CVE-2021-4374: 
WordPress vulnerability analysis and mitigation

CVE-2021-4374 affects the WordPress Automatic Plugin for WordPress in versions up to and including 3.53.2. The vulnerability was discovered and publicly disclosed on September 6, 2021. This security issue impacts WordPress installations using the affected plugin versions (NVD, WPScan).

The vulnerability is classified as a Missing Authorization issue (CWE-862) that allows for arbitrary options updates. The security flaw exists in the process_form.php file due to missing authorization and option validation. The vulnerability has received a CVSS v3.1 base score of 9.8 (CRITICAL) from NIST and 9.1 (CRITICAL) from Wordfence, indicating its severe nature (NVD).

This vulnerability allows unauthenticated attackers to arbitrarily update the settings of a vulnerable site, potentially leading to a complete site compromise. The critical severity rating indicates the significant potential impact on affected WordPress installations (NVD, WPScan).

The vulnerability is particularly dangerous as it requires no authentication and can be exploited remotely. The attack complexity is rated as low, requiring no user interaction for successful exploitation (NVD).

The vulnerability has been fixed in version 3.53.3 of the WordPress Automatic Plugin. Site administrators are strongly advised to update to this version or later to protect their installations (WPScan).