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CVE-2026-4882

CriticalPublished

User Registration Advanced Fields <= 1.6.20 - Unauthenticated Arbitrary File Upload

Published: May 2, 2026
Updated: May 4, 2026
Assigning CNA: Wordfence
Evidence observed: Aug 17, 2026

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

0.7%

Low · next 30 days

Percentile: 49.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The User Registration Advanced Fields plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'URAF_AJAX::method_upload' function in all versions up to, and including, 1.6.20. This makes it possible for unauthenticated attackers to upload arbitrary files on the affected site's server which may make remote code execution possible. Note: The vulnerability can only be exploited if a "Profile Picture" field is added to the form.

Sources

CVE-2026-4882Exploit
User Registration Advanced Fields <= 1.6.20 - Unauthenticated Arbitrary File Upload

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