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User Registration Advanced Fields CVE-2026-4882

| EUVD-2026-26734 CRITICAL
Unrestricted Upload of File with Dangerous Type (CWE-434)
2026-05-02 security@wordfence.com
WordPress RCE File Upload
9.8
CVSS 3.1
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CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
May 02, 2026 - 05:30 vuln.today
EUVD ID Assigned
May 02, 2026 - 05:22 euvd
EUVD-2026-26734
Analysis Generated
May 02, 2026 - 05:22 vuln.today
CVE Published
May 02, 2026 - 05:16 nvd
CRITICAL 9.8

DescriptionNVD

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.

AnalysisAI

Unrestricted file upload in User Registration Advanced Fields plugin for WordPress (≤1.6.20) allows remote unauthenticated attackers to upload executable files and achieve code execution on the web server when Profile Picture fields are enabled in registration forms. Wordfence has documented this critical vulnerability affecting all versions through 1.6.20, with exploitation possible against any site using the Profile Picture form field feature without authentication or user interaction required.

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RemediationAI

Within 24 hours: Identify all WordPress instances using User Registration Advanced Fields plugin ≤1.6.20 via plugin inventory audit; immediately disable the Profile Picture form field feature in all active registration forms. Within 7 days: Contact plugin vendor regarding patch timeline and evaluate alternative registration plugins without this vulnerability; implement Web Application Firewall rules to block file uploads to vulnerable plugin directories (/wp-content/plugins/user-registration-advanced-fields/). …

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CVE-2026-4882 vulnerability details – vuln.today
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