CVE-2026-11900 json
Ad Inserter <= 2.8.16 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary Post Content Disclosure via 'data' Shortcode Attribute
published 2026-07-03 4 mo ago modified 2026-07-07 4 mo ago also EUVD-2026-41520
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 39%
- public exploits
- 0
- none known
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_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.
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.45% chance of exploitation in the next 30 days, higher than 39% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected products
- spacetime Ad Inserter – Ad Manager & AdSense Ads
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/20f0e9ae-786b-4ba8-a6d5-92bf31ebc2c7?source=cve
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.16/ad-inserter.php#L13083
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10569
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10818
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.16/ad-inserter.php#L2101
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.13/ad-inserter.php#L13083
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10569
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10818
- plugins.trac.wordpress.org /browser/ad-inserter/tags/2.8.13/ad-inserter.php#L2101
- plugins.trac.wordpress.org /changeset?sfp_email=&sfph_mail=&reponame=&old=3591792%40ad-inserter&new=3591792%40ad-inserter&sfp_email=&sfph
Sources
- CVE List CVE-2026-11900
- NVD CVE-2026-11900
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.