GHSA-XCMM-M27H-87PR

Vulnerability from github – Published: 2026-03-21 06:30 – Updated: 2026-03-21 06:30
VLAI?
Details

The Build App Online plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.0.23. This is due to the plugin registering the 'build-app-online-update-vendor-product' AJAX action via wp_ajax_nopriv_ without proper authentication checks, capability verification, or nonce validation in the update_vendor_product() function. The function accepts a user-supplied post ID from the request and calls wp_update_post() to modify the post_author field without validating whether the user has permission to modify the specified post. This makes it possible for unauthenticated attackers to modify the post_author of arbitrary posts to 0 (orphaning posts from their legitimate authors), or for authenticated attackers to claim ownership of any post by setting themselves as the author.

Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-3651"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-21T04:17:34Z",
    "severity": "MODERATE"
  },
  "details": "The Build App Online plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.0.23. This is due to the plugin registering the \u0027build-app-online-update-vendor-product\u0027 AJAX action via wp_ajax_nopriv_ without proper authentication checks, capability verification, or nonce validation in the update_vendor_product() function. The function accepts a user-supplied post ID from the request and calls wp_update_post() to modify the post_author field without validating whether the user has permission to modify the specified post. This makes it possible for unauthenticated attackers to modify the post_author of arbitrary posts to 0 (orphaning posts from their legitimate authors), or for authenticated attackers to claim ownership of any post by setting themselves as the author.",
  "id": "GHSA-xcmm-m27h-87pr",
  "modified": "2026-03-21T06:30:25Z",
  "published": "2026-03-21T06:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3651"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/admin/class-build-app-online-admin.php#L556"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/admin/class-build-app-online-admin.php#L565"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/build-app-online/tags/1.0.23/includes/class-build-app-online.php#L233"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/admin/class-build-app-online-admin.php#L556"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/admin/class-build-app-online-admin.php#L565"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/build-app-online/trunk/includes/class-build-app-online.php#L233"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/51564b26-0d7c-4499-9f5a-84f76c5a5e8a?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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