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Vulnerability · Published Oct 16, 2026 · Assigned by Wordfence

CVE-2026-100186User Profile Builder <= 4.0.3 - Unauthenticated Stored Cross-Site Scripting via First Name Field

High 7.2

In plain English

A high-severity cross-site scripting in User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor from cozmoslabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High
Exploit odds (30 days)0.2%top 84.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
cozmoslabs User Profile Builder – Beautiful User Registration Forms, User Profiles & User Role Editor 0 – through 4.0.3

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

References