The UserPlus plugin for WordPress is vulnerable to unauthorized modification of data due to an improper capability check on the 'save_metabox_form' function in versions up to, and including, 2.0. This makes it possible for authenticated attackers, with editor-level permissions or above, to update the registration form role to administrator, which leads to privilege escalation.

References

• https://nvd.nist.gov/vuln/detail/CVE-2024-9519
• https://plugins.trac.wordpress.org/browser/userplus/trunk/admin/admin-post-metaboxes.php?rev=1627771#L62
• https://www.wordfence.com/threat-intel/vulnerabilities/id/1148b18d-7af1-41c6-bd7f-1b2d53cb44e6?source=cve