WPEverest User Registration Advanced Fields Plugin up to 1.6.20 on WordPress URAF_AJAX::method_upload unrestricted upload

Summaryinfo

A vulnerability was found in WPEverest User Registration Advanced Fields Plugin up to 1.6.20 on WordPress. It has been classified as critical. Affected is the function URAF_AJAX::method_upload. This manipulation causes unrestricted upload. The identification of this vulnerability is CVE-2026-4882. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in WPEverest User Registration Advanced Fields Plugin up to 1.6.20 on WordPress. It has been declared as critical. Affected by this vulnerability is the function URAF_AJAX::method_upload. The manipulation with an unknown input leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE 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 weakness was shared by Jude Nwadinobi. It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-4882 since 03/26/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/03/2026). The attack technique deployed by this issue is T1608.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-26734). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Vendor

• WPEverest

Name

• User Registration Advanced Fields Plugin

Version

• 1.6.0
• 1.6.1
• 1.6.2
• 1.6.3
• 1.6.4
• 1.6.5
• 1.6.6
• 1.6.7
• 1.6.8
• 1.6.9
• 1.6.10
• 1.6.11
• 1.6.12
• 1.6.13
• 1.6.14
• 1.6.15
• 1.6.16
• 1.6.17
• 1.6.18
• 1.6.19
• 1.6.20

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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