Elementor Pro is a widely used plugin for WordPress, designed primarily for creating web pages through a drag-and-drop interface. Web developers and designers frequently use it to enhance the look and functionality of their WordPress websites efficiently. With over a million installations, Elementor Pro serves both small businesses and large enterprises striving for a custom-designed online presence. The plugin's appeal lies in its user-friendly interface and the extensive library of elements, themes, and widgets. It is utilized globally to create visually attractive, highly customizable web pages without the need for extensive coding knowledge. However, its popularity can also make it a target for potential security vulnerabilities.
The detected vulnerability involves an unauthenticated arbitrary file upload weakness in Elementor Pro, specifically affecting the file upload field in its form handler. It allows attackers to upload arbitrary files without providing valid authentication information. By exploiting this flaw, a malicious user can bypass the validation checks that typically prevent such activities. The vulnerability arises from improper file validation logic within the elementor_pro_forms_send_form AJAX action handler. Due to its severity, this vulnerability can significantly compromise the security of websites using affected versions of Elementor Pro.
In technical terms, the vulnerability is due to the improper handling of file uploads by the form handler validation logic in Elementor Pro. When two parts of a file upload request are sent, one being empty and the other being the actual payload, the validation method exits early before properly verifying the payload. The payload, often a PHP file or webshell, is then processed and uploaded to the wp-content/uploads/elementor/forms/ directory without restriction. This vulnerability can be exploited with a specially crafted POST request to the admin-ajax.php endpoint, resulting in severe security implications.
When exploited, this vulnerability can lead to unauthorized remote code execution on the affected server, as attackers can upload malicious PHP scripts. These scripts can run with the server's privileges, potentially enabling the attacker to take control of the site or extract sensitive information. Beyond remote code execution, the vulnerability may facilitate further attacks such as data theft, website defacement, or even hosting malware for further malicious activities. The impact is compounded further by the fact that no authentication is necessary for exploitation, increasing the risk of wide-scale abuse.
REFERENCES
- https://patchstack.com/articles/critical-unauthenticated-file-upload-to-rce-in-elementor-pro-plugin/
- https://nvd.nist.gov/vuln/detail/CVE-2026-32475
- https://github.com/absholi7ly/Elementor-Pro-Unauthenticated-Arbitrary-File-Upload-to-RCE
- https://www.bleepingcomputer.com/news/security/critical-elementor-pro-bug-exposes-wordpress-sites-to-rce-attacks/
- Update Elementor Pro to version 4.2.2 or later to fix the vulnerability.
- Configure server settings to validate file types rigorously and implement file upload restrictions.
- Regularly back up the website to quickly restore should a compromise occur.
- Monitor web server logs for suspicious activities related to file uploads.
- Utilize additional security plugins that provide an extra layer of protection against unauthorized uploads.
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