CVE-2024-11642 is a critical security vulnerability classified under CWE-22 (Improper Limitation of a Pathname to a Restricted Directory, commonly known as path traversal) affecting the WordPress plugin 'Post Grid Master – Custom Post Types, Taxonomies & Ajax Filter Everything with Infinite Scroll, Load More, Pagination & Shortcode Builder' developed by mdshuvo. The vulnerability exists in all versions up to and including 3.4.12. It arises from insufficient validation in the 'locate_template' function, which allows an unauthenticated attacker to manipulate file path inputs to include arbitrary files from the server's filesystem. This local file inclusion (LFI) can lead to arbitrary PHP code execution if the attacker can upload or otherwise place a PHP file on the server, such as through image upload functionalities that do not properly restrict file types. The exploit does not require authentication or user interaction, making it highly accessible to remote attackers. Successful exploitation can lead to full compromise of the web server, including bypassing access controls, data theft, and remote code execution. The vulnerability has a CVSS 3.1 base score of 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No official patches are linked yet, so mitigation relies on plugin updates or workarounds. No known exploits are reported in the wild at the time of publication, but the high severity and ease of exploitation make it a significant threat to WordPress sites using this plugin.

The impact of CVE-2024-11642 is severe for organizations running WordPress sites with the vulnerable plugin. An attacker can remotely execute arbitrary PHP code on the web server without authentication, potentially leading to full system compromise. This includes unauthorized access to sensitive data, modification or deletion of content, installation of backdoors or malware, and disruption of website availability. Given WordPress's widespread use, this vulnerability could be leveraged to target high-profile websites, e-commerce platforms, and content management systems globally. The ability to bypass access controls and execute code remotely increases the risk of lateral movement within networks and persistent threats. Organizations may face data breaches, reputational damage, regulatory penalties, and operational downtime if exploited. The lack of required user interaction and low attack complexity further exacerbate the risk, making automated exploitation feasible.

1. Immediately update the 'Post Grid Master' plugin to a patched version once available from the vendor. Monitor official channels for security updates. 2. If no patch is available, temporarily disable or remove the plugin to eliminate the attack surface. 3. Implement strict file upload validation and filtering to prevent uploading of PHP or other executable files, especially in media or image upload functionalities. 4. Employ web application firewalls (WAFs) with custom rules to detect and block attempts to exploit path traversal or local file inclusion patterns targeting this plugin. 5. Restrict file system permissions for the web server user to limit access to sensitive directories and files, minimizing the impact of potential inclusion. 6. Monitor server logs and WordPress activity for suspicious requests or file access patterns indicative of exploitation attempts. 7. Conduct regular security audits and vulnerability scans focusing on WordPress plugins and themes. 8. Educate site administrators on the risks of using outdated or untrusted plugins and the importance of timely updates.