What the vulnerability does
01Description
The User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to, and including, 3.15.5 via the wppb_save_avatar_value() function due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with subscriber-level access and above, to reassign ownership of arbitrary posts and attachments by changing 'post_author'.
Explanation of Vulnerability in Simple Terms
02Summary
User Profile Builder versions up to 3.15.5 contain an authorization flaw that allows authenticated users to modify data they should not have access to. The vulnerability requires a valid user account but no special privileges. An attacker with low-level access can alter information through the plugin's interface, potentially affecting site integrity.
What an attacker can do
03Attacker Capabilities
Modify data or settings they should not have permission to change.
Potential impact on your site
04Site Impact
Authenticated users can alter plugin data or settings, compromising site integrity and user trust.
Conditions required to exploit
05Prerequisites
Attacker must have a valid user account with low-level privileges on the site.
Key dates
06Disclosure timeline
March 31, 2026
CVE published
April 8, 2026
Record updated
