CVE-2026-11900: Ad Inserter (WordPress plugin) · Insecure Direct Object Reference
Affects Ad Inserter (WordPress plugin)Source CVE Database V5
Not known to be exploited · CVSS 4.3 Medium.
Data as of 14 Nov 2026, 20:43 UTC
- EPSS
- 0.4% chance of exploitation in 30 days – higher than 39% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NExploitation evidence
Disclosed: evidence found.
CVE published 3 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| spacetimeAd Inserter – Ad Manager & AdSense Ads | Affected
| Fixed in– |
AI-suggested
Until a fix is available, restrict Contributor-level access or higher to trusted users only. Monitor for plugin updates from spacetime and apply official patches once released.
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
- wordfence.com/threat-intel/vulnerabilities/id/20f0e9ae-786b-4ba8-a6d5-92bf31ebc2c7?source=cve (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php (opens in a new tab)
- plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3591792%40ad-inserter&new=3591792%40ad-inserter&sfp_email=&sfph_mail= (opens in a new tab)