Description

The SiteOrigin Widgets Bundle plugin for WordPress is vulnerable to unauthorized arbitrary shortcode execution in all versions up to, and including, 1.70.4. This is due to a missing capability check on the `siteorigin_widget_preview_widget_action()` function which is registered via the `wp_ajax_so_widgets_preview` AJAX action. The function only verifies a nonce (`widgets_action`) but does not check user capabilities. This makes it possible for authenticated attackers, with Subscriber-level access and above, to execute arbitrary shortcodes by invoking the `SiteOrigin_Widget_Editor_Widget` via the preview endpoint. The required nonce is exposed on the public frontend when the Post Carousel widget is present on a page, embedded in the `data-ajax-url` HTML attribute.

Weaknesses 1

References 6

• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/so-widgets-bundle/tags/1.70.4/base/inc/actions.php#L6
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/so-widgets-bundle/tags/1.70.4/base/inc/actions.php#L75
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/so-widgets-bundle/tags/1.70.4/widgets/editor/editor.php#L120
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/so-widgets-bundle/tags/1.70.4/widgets/post-carousel/post-carousel.php#L590
• plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3460939%40so-widgets-bundle%2Ftrunk&old=3434183%40so-widgets-bundle%2Ftrunk&sfp_email=&sfph_mail=
• wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/bf92c64b-ca76-4af7-a1e4-585a60b03153?source=cve

Remediation