{"id":"CVE-2026-11900","state":"PUBLISHED","title":"Ad Inserter <= 2.8.16 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary Post Content Disclosure via 'data' Shortcode Attribute","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.","publishedAt":"2026-07-03T07:53:08.023Z","updatedAt":"2026-07-07T17:01:17.535Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","source":"Wordfence"},"assigner":"Wordfence","products":["spacetime Ad Inserter – Ad Manager & AdSense Ads"],"affected":[{"vendor":"spacetime","product":"Ad Inserter – Ad Manager & AdSense Ads","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.8.16","versionType":"semver"}]}],"references":["https://www.wordfence.com/threat-intel/vulnerabilities/id/20f0e9ae-786b-4ba8-a6d5-92bf31ebc2c7?source=cve","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L13083","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10569","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10818","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L2101","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L13083","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10569","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10818","https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L2101","https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3591792%40ad-inserter&new=3591792%40ad-inserter&sfp_email=&sfph_mail="],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:10:52.580Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/11xxx/CVE-2026-11900.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-11900","state":"PUBLISHED","datePublished":"2026-07-03T07:53:08.023Z","dateUpdated":"2026-07-07T17:01:17.535Z","assignerShortName":"Wordfence","assignerOrgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateReserved":"2026-06-10T15:43:26.797Z"},"containers":{"cna":{"title":"Ad Inserter <= 2.8.16 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary Post Content Disclosure via 'data' Shortcode Attribute","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"spacetime","product":"Ad Inserter – Ad Manager & AdSense Ads","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.8.16","versionType":"semver"}]}],"references":[{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/20f0e9ae-786b-4ba8-a6d5-92bf31ebc2c7?source=cve"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L13083"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10569"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L10818"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.16/ad-inserter.php#L2101"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L13083"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10569"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10818"},{"url":"https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L2101"},{"url":"https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3591792%40ad-inserter&new=3591792%40ad-inserter&sfp_email=&sfph_mail="}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","baseScore":4.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639 Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"Wordfence","orgId":"b15e7b5b-3da4-40ae-a43c-f7aa60e62599","dateUpdated":"2026-07-03T07:53:08.023Z"},"credits":[{"lang":"en","type":"finder","value":"nightward"}],"timeline":[{"time":"2026-06-10T15:58:36.000Z","lang":"en","value":"Vendor Notified"},{"time":"2026-07-02T19:01:12.000Z","lang":"en","value":"Disclosed"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-06T18:04:48.926021Z","id":"CVE-2026-11900","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-07T17:01:17.535Z"}}]}}}