WordPress 3DPrint Lite Unrestricted File Upload Scanner

The WordPress 3DPrint Lite plugin is used by WordPress site administrators to enable a 3D printing feature on their websites. It allows users to upload 3D print files and make them available for printing directly from the website. This plugin is popular among hobbyists, educators, and professionals who wish to offer 3D printing services via their WordPress platforms. Users can create and manage models, allowing for customization and adjustments before being sent to print. The plugin aims to simplify the 3D printing process by integrating with existing WordPress sites, making it accessible to non-technical users. The goal is to enhance user experience and increase engagement through interactive content.

The arbitrary file upload vulnerability detected in this plugin can allow attackers to upload malicious files to the server without proper authorization checks. This vulnerability exists in versions before 1.9.1.5 of the plugin, specifically in the p3dlite_handle_upload AJAX action. Attackers can exploit this flaw to upload any type of file, which may then be executed by the server. As a result, the uploaded file can contain code that, when executed, performs unauthorized operations or accesses sensitive data. Such vulnerabilities pose a high risk, as they can be used to take over web applications or steal data without the user's consent. Therefore, it is critical to patch these vulnerabilities promptly to protect website integrity.

In technical terms, the arbitrary file upload vulnerability affects the AJAX action p3dlite_handle_upload of the plugin. This endpoint does not perform the necessary authorization checks or validate the uploaded file's content. As a consequence, attackers can craft HTTP POST requests to bypass restrictions and upload malicious PHP files. The lack of server-side validation ensures that these files are saved on the server, potentially leading to remote code execution if the file is accessed via URL. A pattern of exploitation involves uploading a PHP file that executes specific actions like outputting user data or modifying files on the server. Detecting these flaws requires examining server logs or monitoring HTTP traffic for suspicious behavior.

If exploited by a malicious actor, this vulnerability can lead to severe consequences such as unauthorized access to sensitive information and complete server compromise. Attackers could use this access to deface the website, steal sensitive customer data, or install backdoors for future attacks. Once the attacker gains access, they could execute arbitrary code on the server, allowing them to manipulate data or perform other malicious activities. Businesses might face legal and reputational consequences due to data breaches and unauthorized operations. Additionally, compromised systems can become part of a botnet or be leveraged to launch further attacks on other systems.

REFERENCES

• https://wpscan.com/vulnerability/c46ecd0d-a132-4ad6-b936-8acde3a09282
• https://www.exploit-db.com/exploits/50321