Vulnerability 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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/
- https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/
- https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/
- https://plugins.trac.wordpress.org/browser/eventprime-event-calendar-management/
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new
- https://www.wordfence.com/threat-intel/vulnerabilities/id/42aa82ff-0d37-4040-b8f
FAQ
What is CVE-2026-1657?
CVE-2026-1657 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 acti...
How severe is CVE-2026-1657?
CVE-2026-1657 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-1657?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.