CVE-2026-100186CWE-79cross-site-scripting

CVE-2026-100186

High · published October 16, 2026

CVSS v3.1
7.2
EPSS
0%
Percentile
14.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00241 · 14.4th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-10-16T10:17Z
References (7)
https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-confirmation/class-email-confirmation.php#L100 · [email protected]https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-confirmation/class-email-confirmation.php#L99 · [email protected]https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/features/email-confirmation/email-confirmation.php#L470 · [email protected]https://plugins.trac.wordpress.org/browser/profile-builder/tags/4.0.3/front-end/default-fields/first-name/first-name.php#L56 · [email protected]https://plugins.trac.wordpress.org/changeset/3741133/profile-builder · [email protected]https://plugins.trac.wordpress.org/changeset/3741133/profile-builder/trunk/features/email-confirmation/class-email-confirmation.php · [email protected]https://www.wordfence.com/threat-intel/vulnerabilities/id/f3f2ecdb-bbd0-4834-b731-88724ca0dfd7?source=cve · [email protected]
EPSS history
Timeline
  • 17 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 05:30Z
    User Profile Builder <= 4.0.3 - Unauthenticated Stored Cross-Site Scripting via First Name Field
    cvelistv5
  • 16 OCT 05:30Z
    User Profile Builder <= 4.0.3 - Unauthenticated Stored Cross-Site Scripting via First Name Field
    cvelistv5