GHSA-VPQR-9V4H-MGFF

Vulnerability from github – Published: 2026-09-19 09:32 – Updated: 2026-09-19 09:32
VLAI
Details

The Metasync plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the save_instant_indexing_settings() function in versions up to, and including, 2.6.23. This function is registered on the admin_init hook and only checks for the presence of $_POST['submit'] before writing attacker-supplied $_POST['metasync_post_types'] into the site-wide 'metasync_options_instant_indexing' option via update_option(); no current_user_can()/current_user_has_plugin_access() check and no nonce verification are performed. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify the site's Google Instant Indexing post-type configuration, controlling which post types are auto-submitted to Google's Instant Indexing service.

Severity
4.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-15947"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-19T08:16:53Z",
    "severity": "MODERATE"
  },
  "details": "The Metasync plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the save_instant_indexing_settings() function in versions up to, and including, 2.6.23. This function is registered on the admin_init hook and only checks for the presence of $_POST[\u0027submit\u0027] before writing attacker-supplied $_POST[\u0027metasync_post_types\u0027] into the site-wide \u0027metasync_options_instant_indexing\u0027 option via update_option(); no current_user_can()/current_user_has_plugin_access() check and no nonce verification are performed. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify the site\u0027s Google Instant Indexing post-type configuration, controlling which post types are auto-submitted to Google\u0027s Instant Indexing service.",
  "id": "GHSA-vpqr-9v4h-mgff",
  "modified": "2026-09-19T09:32:11Z",
  "published": "2026-09-19T09:32:11Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-15947"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/metasync/tags/2.6.16/admin/class-metasync-admin.php#L384"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/metasync/tags/2.6.16/admin/class-metasync-admin.php#L6358"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/metasync/tags/2.6.16/admin/class-metasync-admin.php#L6364"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/metasync/tags/2.6.17/admin/class-metasync-admin.php#L384"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/metasync/tags/2.6.17/admin/class-metasync-admin.php#L6358"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/metasync/tags/2.6.17/admin/class-metasync-admin.php#L6364"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3676919"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/1bfba54f-961d-4889-9272-0020c9fa0801?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}



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