CVE-2013-2108: 
WordPress vulnerability analysis and mitigation

The WordPress WP Cleanfix Plugin version 2.4.4 was affected by a Cross-Site Request Forgery (CSRF) vulnerability identified as CVE-2013-2108. The vulnerability was discovered and disclosed in May 2013, affecting the plugin's administrative functionality (WPScan).

The vulnerability exists in the wpCleanFixAjax.php file where there is inadequate CSRF protection for administrative actions. The file contains code that processes POST requests with a 'command' parameter that is only stripped of HTML tags before being evaluated. The vulnerable code is protected by an administrator check (is_admin() && _wpdk_is_ajax()), but lacks CSRF tokens (Openwall).

When exploited, this CSRF vulnerability could allow an attacker to execute arbitrary PHP code on the target system through social engineering attacks against an authenticated administrator. While WordPress administrators typically have the ability to execute PHP code, this vulnerability provides an unauthorized vector for code execution (Openwall).

The vulnerability can be exploited by crafting a malicious request to '/wp-admin/admin-ajax.php' with the action parameter set to 'wpCleanFixAjax' and a command parameter containing the PHP code to be executed. The exploitation requires the target user to be logged in as an administrator and to be socially engineered into visiting a malicious page (Openwall).

The vulnerability was fixed in WP Cleanfix version 3.0.2. Users are advised to upgrade to this version or later to protect against this security issue (WPScan).