Executive brief
WPForms Pro, a popular WordPress plugin used by millions to create website forms, contains a security flaw in its file upload feature. An attacker can bypass security checks to upload malicious files to the web server. If successful, this could allow the attacker to take complete control of the website, potentially leading to data theft or service disruption.
Technical details
The WPForms Pro plugin for WordPress is vulnerable to Arbitrary File Upload in versions up to 1.10.1.1. The flaw exists within the 'ajax_chunk_upload_finalize' function, where file type validation is performed only after the file chunks and metadata have been written to the disk. Because the plugin fails to delete the assembled file if validation fails, an unauthenticated attacker can successfully place executable files on the server. This vulnerability can be leveraged to achieve remote code execution (RCE). The attack complexity is rated as high, likely due to the specific requirements of the chunked upload process.
Affected products
- WPForms WPForms Pro up to, and including, 1.10.1.1
Timeline
- 2026-07-25: disclosed: CVE published to NVD dataset