User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder <= 5.3.1 - Authenticated (Subscriber+) Stored Cross-Site Scripting via User Bio
- ID
- WPSEC-2026-2712
- Plugin
- User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder (user-registration)
- Affected
- all versions before 5.3.2
- Remediation
- Update to 5.3.2 or later.
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
- Weakness
- CWE-79
- Usage
- Plugin Medium · Affected versions Medium among sites WPSec scans, 2026-11-07
- Attack surface
- User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder on WPSec AttackSurface
- Fix released
- Published
Description
The User Registration & Membership plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the User Bio (description) profile field in all versions up to, and including, 5.3.1, due to insufficient input sanitization. The profile update saves the bio with update_user_meta(), which skips the HTML filtering WordPress applies in wp_update_user() to users without the unfiltered_html capability. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts that will execute whenever a user visits a page that displays the author biography.
References
- https://wpsec.com/vuln/WPSEC-2026-2712/
- https://plugins.svn.wordpress.org/user-registration/tags/5.3.2/
- https://wordpress.org/plugins/user-registration/
Published by WPSec. Provided as is, without warranty. Corrections: contact us.
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