CVE-2026-4882CWE-434

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

Critical · published May 2, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
58.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00869 · 58.4th percentile
Weakness
CWE-434 · Unrestricted Upload of File with Dangerous Type
Published
2026-05-02T04:27Z
EPSS history
Timeline
  • 02 MAY 04:27Z
    User Registration Advanced Fields <= 1.6.20 - Unauthenticated Arbitrary File Upload
    cvelistv5