What the vulnerability does
01Description
The EventPrime plugin for WordPress is vulnerable to unauthorized image file upload in all versions up to, and including, 4.2.8.4. This is due to the plugin registering the upload_file_media AJAX action as publicly accessible (nopriv-enabled) without implementing any authentication, authorization, or nonce verification despite a nonce being created. This makes it possible for unauthenticated attackers to upload image files to the WordPress uploads directory and create Media Library attachments via the ep_upload_file_media endpoint.
Explanation of Vulnerability in Simple Terms
02Summary
EventPrime versions up to 4.2.8.4 lack proper authorization checks, allowing unauthenticated attackers to modify data on the site. The vulnerability requires no user interaction and can be exploited remotely over the network. Site administrators should update to a version newer than 4.2.8.4 to prevent unauthorized modifications.
What an attacker can do
03Attacker Capabilities
Modify site data without logging in or having permission to do so.
Potential impact on your site
04Site Impact
Attackers can alter event data, bookings, or ticket information without authorization.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
February 17, 2026
CVE published
April 8, 2026
Record updated
