WordPress · Ad Inserter · CVE-2026-11900
**Name of the Vulnerable Software and Affected Versions**
Ad Inserter – Ad Manager & AdSense Ads versions prior to 2.8.17
**Description**
An Insecure Direct Object Reference exists via the `data` attribute of the [adinserter] shortcode. The `replace ai tags()` function processes a {reusable-block-N} tag pattern that calls `get post field('post content', N)` without verifying the user's capability via `current user can('read post')`, without restricting the post type to `wp block`, and without checking the post status. This allows authenticated attackers with Contributor-level access or higher to read the full content of arbitrary posts, including Private, Draft, Pending, Trashed, and password-protected posts owned by other users, by placing the shortcode in a post they own and previewing it.
**Recommendations**
Update to a version newer than 2.8.16.