Description
The User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via First Name Field in all versions up to, and including, 4.0.3 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. This vulnerability is only exploitable when the Email Confirmation feature is enabled in Profile Builder.
References7
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/f…
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/f…
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/f…
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/f…
- plugins.trac.wordpress.org/changeset/3741133/profile-builder
- plugins.trac.wordpress.org/changeset/3741133/profile-builder/tr…
- www.wordfence.com/threat-intel/vulnerabilities/id/f3f2ecdb-bbd0…
Metrics
- CVSS 3.1
-
7.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 15 · as of 10 November 2026
- CWE
- CWE-79
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.