vBulletin before 5.6.9 PL1 allows an unauthenticated remote attacker to execute arbitrary code via a crafted HTTP request that triggers deserialization. This occurs because verify_serialized checks that a value is serialized by calling unserialize and then checking for errors. The fixed versions are 5.6.7 PL1, 5.6.8 PL1, and 5.6.9 PL1.

vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data in an ajax/render/widget_tabbedcontainer_tab_panel request. NOTE: this issue exists because of an incomplete fix for CVE-2019-16759. ALSO NOTE: CVE-2020-7373 is a duplicate of CVE-2020-17496. CVE-2020-17496 is the preferred CVE ID to track this vulnerability.

vBulletin 5.5.4 through 5.6.2 allows remote command execution via crafted subWidgets data in an ajax/render/widget_tabbedcontainer_tab_panel request. NOTE: this issue exists because of an incomplete fix for CVE-2019-16759.

vBulletin before 5.5.6pl1, 5.6.0 before 5.6.0pl1, and 5.6.1 before 5.6.1pl1 has incorrect access control.

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in Bulletin WordPress Announcement & Notification Banner Plugin – Bulletin.This issue affects WordPress Announcement & Notification Banner Plugin – Bulletin: from n/a through 3.8.5.

A cross-site scripting (XSS) vulnerability in the Admin Control Panel of vBulletin 5.7.5 and 6.0.0 allows attackers to execute arbitrary web scripts or HTML via the /login.php?do=login url parameter.

The Announcement & Notification Banner – Bulletin plugin for WordPress is vulnerable to Cross-Site Request Forgery due to a missing nonce validation on the 'bulletinwp_update_bulletin_status', 'bulletinwp_update_bulletin', 'bulletinwp_update_settings', 'bulletinwp_update_status', 'bulletinwp_export_bulletins', and 'bulletinwp_import_bulletins' functions in versions up to, and including, 3.7.0. This makes it possible for unauthenticated attackers to modify the plugin's settings, modify bulletins, create new bulletins, and more, via a forged request granted they can trick a site's user into performing an action such as clicking on a link.

The Announcement & Notification Banner – Bulletin plugin for WordPress is vulnerable to unauthorized access and modification of data due to a missing capability check on the 'bulletinwp_update_bulletin_status', 'bulletinwp_update_bulletin', 'bulletinwp_update_settings', 'bulletinwp_update_status', 'bulletinwp_export_bulletins', and 'bulletinwp_import_bulletins' functions functions in versions up to, and including, 3.6.0. This makes it possible for authenticated attackers with subscriber-level access, and above, to modify the plugin's settings, modify bulletins, create new bulletins, and more.

The Admin CP in vBulletin 5.6.3 allows XSS via a Junior Member Title to User Title Manager.

The Admin CP in vBulletin 5.6.3 allows XSS via a Style Options Settings Title to Styles Manager.