Ad Inserter <= 2.8.16 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary Post Content Disclosure via 'data' Shortcode Attribute
| CVE | CVE-2026-11900 |
|---|---|
| CVSS | 4.3 (Medium) |
| Publicly Published | July 2, 2026 |
| Last Updated | July 3, 2026 |
| Researcher |
nightward
|
Description
The Ad Inserter – Ad Manager & AdSense Ads plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 2.8.16 via the 'data' attribute of the [adinserter] shortcode. This is due to the replace_ai_tags() function processing a {reusable-block-N} tag pattern that calls get_post_field('post_content', N) without verifying the requesting user's capability with current_user_can('read_post'), without restricting the post type to 'wp_block', and without checking the post status. This makes it possible for authenticated attackers, with Contributor-level access and above, 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.
References
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
- plugins.trac.wordpress.org
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Vulnerability Details for Ad Inserter – Ad Manager & AdSense Ads
| Software Type | Plugin |
|---|---|
| Software Slug | ad-inserter (view on wordpress.org) |
| Patched? | Yes |
| Remediation | Update to version 2.8.17, or a newer patched version |
| Affected Version |
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| Patched Version |
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Recent vulnerabilities in Ad Inserter – Ad Manager & AdSense Ads
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