SiteOrigin Widgets Bundle <= 1.70.4 - Missing Authorization to Authenticated (Subscriber+) Arbitrary Shortcode Execution

Missing Authorization
CVE CVE-2026-2127
CVSS Medium (5.4)
Publicly Published February 17, 2026
Last Updated February 18, 2026
Researcher Nguyen Ba Hung (bashu)
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.

References

1 affected software package

Software Type Plugin
Software Slug so-widgets-bundle (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 1.70.4
Patched Version
  • 1.71.0
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