CVE-2026-109447 User Profile Builder WordPress Plugin - Privilege Escalation

User Profile Builder WordPress plugin <= 4.0.3 contains a privilege escalation caused by lack of allow-list validation on the 'role' parameter in wppb_add_meta_to_user_on_activation(), letting unauthenticated attackers gain administrator privileges via the public registration form, exploit requires legacy 'role' form field, email confirmation, and open user registration.

CVSS base score 8.1 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
16 October 2026
Updated
16 October 2026
Weakness
CWE-269

Vendor fix

Update to a version later than 4.0.3 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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