CVE WatchOct 28, 2026

CVE-2026-84999

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 v

CVSS

9.8

Critical

EPSS

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KEV

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Exploit Today

0-100

Published: Oct 28, 2026 · Last modified: Oct 28, 2026 · CWE-434

EPSS · 30d

Not enough EPSS history yet.

Technical description

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.

Official references

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2026-1093848.8 HIG

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——0Xerte Online Toolkits through 3.15.5 contains a remote code execution vulnerability that allows authenticated users with system permission to run PHP by importing a crafted language pack. Attackers can upload a ZIP via import_language.php containing a .inc file, then request it through the language parameter to execute code on the server.13h CVE-2014-1251388.8 HIG

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