EventPrime <= 4.2.8.4 - Missing Authorization to Unauthenticated Image Upload via 'ep_upload_file_media' AJAX Endpoint

Missing Authorization
CVE CVE-2026-1657
CVSS Medium (5.3)
Publicly Published February 16, 2026
Last Updated February 17, 2026
Researcher Tharadol Suksamran (d3kc4rt_1)
Description

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.

References

1 affected software package

Software Type Plugin
Software Slug eventprime-event-calendar-management (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 4.2.8.4
Patched Version
  • 4.2.8.5
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