What the vulnerability does
01Description
The User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'email' parameter in all versions up to, and including, 4.0.0 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The payload reaches administrators with the manage_options capability when they visit the Users > Unconfirmed Email Addresses list table and interact with row-action links, as the poisoned javascript: href is rendered verbatim into the page HTML by row_actions().
Explanation of Vulnerability in Simple Terms
02Summary
User Profile Builder versions up to 4.0.0 contain a cross-site scripting (XSS) vulnerability that allows attackers to inject malicious scripts into the site. An attacker can craft a malicious link that, when clicked by a site visitor, executes JavaScript in the victim's browser. This can lead to session hijacking, credential theft, or defacement. The vulnerability affects all users who click a specially crafted link.
What an attacker can do
03Attacker Capabilities
Inject and execute malicious JavaScript in visitors' browsers via a crafted link.
Potential impact on your site
04Site Impact
Visitors clicking malicious links could have sessions hijacked, credentials stolen, or see defaced content.
Conditions required to exploit
05Prerequisites
A site visitor must click an attacker-supplied link while logged into or visiting the site.
Key dates
06Disclosure timeline
September 1, 2026
CVE published
