CVE-2026-11900 (GCVE-0-2026-11900)

Vulnerability from cvelistv5 – Published: 2026-07-03 07:53 – Updated: 2026-07-03 07:53
VLAI
Title
Ad Inserter <= 2.8.16 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary Post Content Disclosure via 'data' Shortcode Attribute
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.
Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CWE
  • CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
Impacted products
Credits
nightward
Show details on NVD website
To clipboard 

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        {
          "defaultStatus": "unaffected",
          "product": "Ad Inserter \u2013 Ad Manager \u0026 AdSense Ads",
          "vendor": "spacetime",
          "versions": [
            {
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              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
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      ],
      "credits": [
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          "type": "finder",
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        }
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          "value": "The Ad Inserter \u2013 Ad Manager \u0026 AdSense Ads plugin for WordPress is vulnerable to Insecure Direct Object Reference in versions up to and including 2.8.16 via the \u0027data\u0027 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(\u0027post_content\u0027, N) without verifying the requesting user\u0027s capability with current_user_can(\u0027read_post\u0027), without restricting the post type to \u0027wp_block\u0027, 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."
        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
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          }
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      "problemTypes": [
        {
          "descriptions": [
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              "description": "CWE-639 Authorization Bypass Through User-Controlled Key",
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              "type": "CWE"
            }
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      "providerMetadata": {
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        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
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        },
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        },
        {
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        },
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          "url": "https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L13083"
        },
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          "url": "https://plugins.trac.wordpress.org/browser/ad-inserter/tags/2.8.13/ad-inserter.php#L10569"
        },
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        },
        {
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        },
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          "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3591792%40ad-inserter\u0026new=3591792%40ad-inserter\u0026sfp_email=\u0026sfph_mail="
        }
      ],
      "timeline": [
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          "lang": "en",
          "time": "2026-06-10T15:58:36.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-07-02T19:01:12.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Ad Inserter \u003c= 2.8.16 - Insecure Direct Object Reference to Authenticated (Contributor+) Arbitrary Post Content Disclosure via \u0027data\u0027 Shortcode Attribute"
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-11900",
    "datePublished": "2026-07-03T07:53:08.023Z",
    "dateReserved": "2026-06-10T15:43:26.797Z",
    "dateUpdated": "2026-07-03T07:53:08.023Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-07-04",
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      "percentile": "0.19101"
    },
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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