CVE-2026-3601
Description
The User Registration & Membership plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `embed_form_action()` function in all versions up to, and including, 5.1.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to append shortcode content to arbitrary pages they do not own or have permission to edit.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
References
- https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/admin/class-ur-admin-assets.php#L370
- https://plugins.trac.wordpress.org/browser/user-registration/tags/5.1.2/includes/class-ur-ajax.php#L1003
- https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/admin/class-ur-admin-assets.php#L370
- https://plugins.trac.wordpress.org/browser/user-registration/trunk/includes/class-ur-ajax.php#L1003
- https://plugins.trac.wordpress.org/changeset/3485702/user-registration/trunk/includes/class-ur-ajax.php?contextall=1
- https://www.wordfence.com/threat-intel/vulnerabilities/id/c8798fb2-4cab-4960-9e32-fd74bb4a5091?source=cve
CWEs
CWE-862
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.