Attack Chain

1. Attacker gains Contributor-level or higher access to the WordPress instance, either through credential compromise or registration (if enabled).
2. Attacker crafts a malicious HTTP request targeting the vulnerable lae_get_template_part() function. This request includes a template name parameter containing a payload with directory traversal sequences (e.g., ../../../../etc/passwd).
3. The vulnerable lae_get_template_part() function attempts to sanitize the input using str_replace(), which is insufficient to prevent directory traversal.
4. The function uses the manipulated template name parameter to include a file from the server's file system.
5. If the included file is a PHP file, the server executes the code within the file.
6. The attacker leverages the ability to include arbitrary files to read sensitive information, such as WordPress configuration files (e.g., wp-config.php) containing database credentials.
7. The attacker further escalates the attack by including files that enable remote code execution, such as log files or session files where they can inject malicious PHP code.
8. The attacker achieves arbitrary code execution on the server, allowing them to install backdoors, deface the website, or steal sensitive data.

Impact

Successful exploitation of this LFI vulnerability (CVE-2026-1620) could allow attackers to gain unauthorized access to sensitive information, including database credentials and configuration files. An attacker could read arbitrary files on the server leading to full system compromise. Since this is a popular plugin, a successful widespread attack could impact thousands of WordPress sites across various sectors.

Recommendation

• Upgrade the Livemesh Addons for Elementor plugin to a version greater than 9.0 to patch CVE-2026-1620.
• Implement a Web Application Firewall (WAF) rule to detect and block requests containing directory traversal sequences in the template name parameter targeting the lae_get_template_part() function.
• Deploy the provided Sigma rule to your SIEM to detect exploitation attempts by monitoring web server logs for directory traversal patterns in the request URI.
• Review user access and permissions within the WordPress environment, ensuring that users are granted only the necessary privileges to minimize the impact of potential account compromise.