CVE-2020-10568: 
WordPress vulnerability analysis and mitigation

The sitepress-multilingual-cms (WPML) plugin before version 4.3.7-b.2 for WordPress contains a Cross-Site Request Forgery (CSRF) vulnerability identified as CVE-2020-10568. The vulnerability was discovered in March 2020 and stems from a loose comparison in the plugin's code, which can lead to remote code execution through the includes/class-wp-installer.php file (NVD, WPScan).

The vulnerability exists due to improper validation in the installer_download_plugin action where the WordPress nonce token is compared using loose comparison () instead of strict comparison (=). This implementation flaw allows attackers to bypass the nonce verification by exploiting PHP's type juggling behavior when comparing strings to numbers. 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 (Medium Blog).

When successfully exploited, attackers can craft malicious links that, when opened by an authenticated administrator, allow the execution and installation of malicious code or plugins on the website. This can lead to complete compromise of the WordPress installation through remote code execution (Medium Blog).

The vulnerability has been patched in WPML version 4.3.7-b.2. Users are strongly advised to update their WPML plugin to this version or later to protect against this security issue (WPScan).