Arbitrary File Upload Vulnerability in User Registration Advanced Fields Plugin for WordPress
CVE-2026-4882

9.8CRITICAL

Key Information:

Vendor

WordPress
Status
User Registration Advanced Fields
Vendor
CVE Published:
2 May 2026

What is CVE-2026-4882?

The User Registration Advanced Fields plugin for WordPress is susceptible to arbitrary file upload due to inadequate file type validation within the 'URAF_AJAX::method_upload' function. This flaw affects all versions up to 1.6.20. If a 'Profile Picture' field is enabled, unauthenticated attackers could exploit this vulnerability to upload arbitrary files to the server, potentially leading to remote code execution.

Affected Version(s)

User Registration Advanced Fields 0 <= 1.6.20

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://wpuserregistration.com/features/advanced-fields/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Jude Nwadinobi
.