---
id: CVE-2026-11900
title: >-
  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
summary: >-
  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_a…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-639
published: '2026-07-03'
updated: '2026-07-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-11900'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10569
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10818
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L13083
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L2101
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10569
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10818
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L13083
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L2101
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3591792%40ad-inserter&new=3591792%40ad-inserter&sfp_email=&sfph_mail=
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/20f0e9ae-786b-4ba8-a6d5-92bf31ebc2c7?source=cve
    label: security@wordfence.com
tags:
  - nvd
ingestedAt: '2026-07-04T07:55:53.782Z'
epss: 0.00454
epssPercentile: 0.36784
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.