CVE-2026-6431
Received Received - Intake

Stored XSS in User Profile Builder WordPress Plugin

Publication date: 2026-09-07

Last updated on: 2026-09-07

Assigner: Wordfence

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 the 'Biographical Info' meta field parameter in all versions up to, and including, 3.15.7 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.

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Meta Information

Published
2026-09-07
Last Modified
2026-09-07
Generated
2026-09-07
AI Q&A
2026-09-07
EPSS Evaluated
N/A
NVD
CVE-2026-6431
EUVD
EUVD-2026-72367

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
wp_user_profile_builder wp_user_profile_builder to 3.15.7 (inc)
wp_user_profile_builder user_profile_builder to 3.15.7 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

This vulnerability is a Stored Cross-Site Scripting (XSS) issue in the User Profile Builder WordPress plugin. It allows unauthenticated attackers to inject malicious scripts via the 'Biographical Info' field due to insufficient input sanitization and output escaping. The injected scripts execute when users access the compromised page.

Detection Guidance

This vulnerability involves Stored Cross-Site Scripting via the 'Biographical Info' meta field in the User Profile Builder plugin. To detect it, inspect WordPress sites using this plugin for suspicious scripts in user biographical data fields. Check plugin versions and look for unauthorized script injections in page content.

Impact Analysis

Unauthenticated attackers could steal user sessions, deface websites, or redirect users to malicious sites. Users accessing infected pages may have their data compromised or be exposed to further attacks. Website administrators may face reputational damage or loss of user trust.

Compliance Impact

This vulnerability could lead to unauthorized data access or disclosure, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations may face fines or penalties for non-compliance if user data is compromised through this exploit.

Mitigation Strategies

Immediately update the User Profile Builder plugin to the latest version beyond 3.15.7. If an update is unavailable, disable or remove the plugin until a patch is released. Review user profiles for injected scripts and remove any malicious content.

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