CVE-2026-4882: CWE-434 Unrestricted Upload of File with Dangerous Type in WPEverest User Registration Advanced Fields
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.
AI Analysis
Technical Summary
CVE-2026-4882 is a critical vulnerability in the WPEverest User Registration Advanced Fields WordPress plugin, affecting all versions up to 1.6.20. The issue arises from the lack of proper file type validation in the 'URAF_AJAX::method_upload' function, enabling unauthenticated attackers to upload arbitrary files if a "Profile Picture" field is configured. This unrestricted file upload vulnerability (CWE-434) can potentially allow remote code execution on the server hosting the vulnerable plugin.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload arbitrary files to the server, which may lead to remote code execution. This compromises confidentiality, integrity, and availability of the affected system, as reflected by the CVSS 3.1 score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch links are provided, users should monitor WPEverest's official channels for updates. As a temporary mitigation, avoid adding or disable the "Profile Picture" field in registration forms to prevent exploitation of this vulnerability.
CVE-2026-4882: CWE-434 Unrestricted Upload of File with Dangerous Type in WPEverest User Registration Advanced Fields
Description
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-4882 is a critical vulnerability in the WPEverest User Registration Advanced Fields WordPress plugin, affecting all versions up to 1.6.20. The issue arises from the lack of proper file type validation in the 'URAF_AJAX::method_upload' function, enabling unauthenticated attackers to upload arbitrary files if a "Profile Picture" field is configured. This unrestricted file upload vulnerability (CWE-434) can potentially allow remote code execution on the server hosting the vulnerable plugin.
Potential Impact
Successful exploitation allows unauthenticated attackers to upload arbitrary files to the server, which may lead to remote code execution. This compromises confidentiality, integrity, and availability of the affected system, as reflected by the CVSS 3.1 score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch links are provided, users should monitor WPEverest's official channels for updates. As a temporary mitigation, avoid adding or disable the "Profile Picture" field in registration forms to prevent exploitation of this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-03-26T08:01:39.713Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f589f3cbff5d861095a05c
Added to database: 5/2/2026, 5:21:55 AM
Last enriched: 5/2/2026, 5:36:33 AM
Last updated: 5/2/2026, 7:40:17 AM
Views: 5
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