CVE-2026-1657 EventPrime <= 4.2.8.4 - Missing Authorization to Unauthenticated Image Upload via 'ep_upload_file_media' AJAX Endpoint
Unauthenticated attackers can upload image files to the WordPress uploads directory due to missing authorization checks in the EventPrime plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1657?
CVE-2026-1657 is a medium-severity missing authorization vulnerability in metagauss EventPrime – Events Calendar, Bookings and Tickets, published on 17 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-862
Which versions are affected by CVE-2026-1657?
How do I fix CVE-2026-1657?
No fix has been published for CVE-2026-1657 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-1657 being exploited?
There is no known exploitation of CVE-2026-1657 in the wild and no public exploit code.
Public exploit code: 2 proofs of concept on GitHub.
Sources
Also known as GHSA-4x73-7vhc-g4xh.