Live › vulnerability › CVE-2026-84999
Go to dashboardThe Pie Register Premium WordPress plugin, up to and including 3.8.4.0, accepts file uploads through its piereg_file_upload AJAX handler without an authentication or nonce check and does not stop uploads that failed file type validation. An unauthenticated attacker can upload a PHP script and run it on the server by requesting the path the response returns.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-28 03:31 UTC. All times on this page are UTC.
Sites running the Pie Register Premium plugin at version 3.8.4.0 or earlier are exposed, because the flawed upload handler is reachable by anyone who can reach the site over HTTP. Sites that do not have this premium plugin installed can skip it.
No product ranges from the sources yet.
wp plugin get pie-register --field=version (the slug is unknown from the sources).grep -r "piereg_file_upload" wp-content/plugins/.3.8.4.0; the exact fixed version is unknown from the sources..php files and review them.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
The Pie Register Premium plugin for WordPress is vulnerable to Unrestricted File Type Upload in all versions up to, and including, 3.8.4.0 via the piereg_file_upload function. This is due to the plugin performing file type validation via wp_check_filetype and wp_check_filetype_and_ext but never checking whether those validation calls produced errors before move_uploaded_file() is called, combined with no nonce or capability check on the AJAX handler. This makes it possible for unauthenticated attackers to upload files of dangerous types (e.g. PHP scripts) that may be executable, which makes remote code execution possible. The server returns the generated destination filename in the response, giving the attacker the exact path needed to trigger the uploaded file.
This page as .md · .json · in your agent: get_signal("CVE-2026-84999")
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