# CVE-2026-92978: User Registration Membership plugin cross-site request forgery

Source: https://junglewise.ai/threats/cve-2026-92978-the-user-registration-membership-free-paid-memberships  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-17. Updated: 2026-10-17  
License: CC BY 4.0 with a link back

CVE-2026-92978 · Severity: medium · CVSS 4.3 · Published 2026-10-17

The User Registration & Membership WordPress plugin manages user signups, subscriptions, and site access control. An attacker can trick a site administrator into performing actions that approve fake user registrations or lock legitimate users out of the site, without the admin's knowledge or consent.

Vendors: [Wordpress](https://junglewise.ai/threats/vendors/wordpress).

## Quick answers

**Is CVE-2026-92978 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92978 being exploited in the wild.

**How severe is CVE-2026-92978?** Medium severity, with a CVSS score of 4.3, published 17 October 2026.

**Which products and versions are affected?** Wordpress User Registration & Membership up to and including 5.2.8.

**Is there a fix for CVE-2026-92978?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-92978 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-92978?** Check whether you run Wordpress User Registration & Membership at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A cross-site request forgery vulnerability exists in the trigger_bulk_action function due to missing nonce validation. An attacker can bypass the nonce check in trigger_query_actions by supplying an empty new_role parameter, causing the handler to return early and pass control to the unprotected trigger_bulk_action function. An authenticated admin click on a malicious link is required to trigger the attack.

## Affected products

- WordPress User Registration & Membership up to and including 5.2.8

## Timeline

- 2026-10-17: disclosed

## References

- [https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/admin/class-ur-admin-user-list-manager.php](https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/admin/class-ur-admin-user-list-manager.php)
- [https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/admin/class-ur-admin-user-list-manager.php](https://plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8/includes/admin/class-ur-admin-user-list-manager.php)

## Related threats

- [User Registration & Membership authentication bypass via omitted membership field](https://junglewise.ai/threats/cve-2026-109873-the-user-registration-membership-wordpress-plugin-before-5-3-2)