Risk Letters

Exploited vulnerability

CVE-2026-4882

TLP:CLEAR

Unrestricted Upload of File with Dangerous Type

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 vulnerabil

Facts

  • Vendor: WPEverest
  • Product: User Registration Advanced Fields
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 0.7 %
  • First known exploitation: 13 October 2026
  • First seen by Risk Letters: 2 May 2026

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD