Description
The User Registration & Membership – Free & Paid Memberships, Subscriptions, Content Restriction, User Profile, Custom User Registration & Login Builder plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 5.2.8 This is due to missing or incorrect nonce validation on the trigger_bulk_action function. This makes it possible for unauthenticated attackers to force administrators to approve pending user registrations or deny arbitrary user accounts, locking targeted users out of the site via a forged request granted they can trick a site administrator into performing an action such as clicking on a link. An attacker can bypass the earlier nonce check in trigger_query_actions() by supplying an empty new_role parameter, which causes that handler to return early and cede control to the unprotected trigger_bulk_action() handler; the exit() call at the end of that handler additionally prevents WordPress core's own bulk-users nonce validation from executing.
References6
- plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8…
- plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8…
- plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8…
- plugins.trac.wordpress.org/browser/user-registration/tags/5.2.8…
- plugins.trac.wordpress.org/changeset/3741339/user-registration/…
- www.wordfence.com/threat-intel/vulnerabilities/id/713c4652-9ca0…
Metrics
- CVSS 3.1
-
4.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N - EPSS — exploit probability
- 0% percentile: 5 · as of 10 November 2026
- CWE
- CWE-352
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