Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content <= 4.17.5 - Unauthenticated Privilege Escalation via Registration Form ID Tampering
- ID
- WPSEC-2026-0401
- Plugin
- Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content – ProfilePress (wp-user-avatar)
- Affected
- from 3.0 before 4.17.6
- Remediation
- Update to 4.17.6 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness
- CWE-269
- Usage
- Plugin High · Affected versions Medium among sites WPSec scans, 2026-10-22
- Attack surface
- Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content on WPSec AttackSurface
- Fix released
- Published
Description
The Paid Membership Plugin, Ecommerce, User Registration Form, Login Form, User Profile & Restrict Content plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 4.17.5. This is due to the registration handlers accepting a client-supplied form ID (signup_form_id, melange_id or pp_melange_id) without verifying that it belongs to a form displayed on the site, and using that ID to decide the new user's role. This makes it possible for unauthenticated attackers to register through the ID of a different registration form, including one that is not published, and receive the role that form assigns or a role its role selector allows. Attackers can also submit form ID 0 or the tabbed widget flag so that form-specific checks, such as invite codes and CAPTCHA provided by add-ons, are not applied to registration and login. Exploitation requires user registration to be enabled, and a privilege gain requires another registration form that assigns a higher role.
References
- https://wpsec.com/vuln/WPSEC-2026-0401/
- https://plugins.svn.wordpress.org/wp-user-avatar/tags/4.17.6/
- https://wordpress.org/plugins/wp-user-avatar/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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