XSS in Cozmoslabs User Profile Builder – Beautiful Registration Forms, Profiles & Role Editor
CVE-2026-100186
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.wordfence.com/threat-intel/vulnerabilities/id/f3f2ecdb-bbd0-4834-b731-88724…
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-co…
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-co…
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/default…
- plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-co…
- plugins.trac.wordpress.org/changeset/3741133/profile-builder
- plugins.trac.wordpress.org/changeset/3741133/profile-builder/trunk/features/ema…
Frequently asked questions
- What is CVE-2026-100186?
- CVE-2026-100186 is a high-severity vulnerability in Cozmoslabs User Profile Builder – Beautiful Registration Forms, Profiles & Role Editor, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-10-16.
- How severe is CVE-2026-100186?
- High severity. CVSS v3 base score is 7.2 out of 10.