GHSA-G9W4-M5FX-X3WV

Vulnerability from github – Published: 2026-03-18 12:31 – Updated: 2026-03-19 19:37
VLAI?
Summary
Yoast Duplicate Post has an Authenticated (Contributor+) Missing Authorization to Arbitrary Post Duplication and Overwrite
Details

The Yoast Duplicate Post plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the clone_bulk_action_handler() and republish_request() functions in all versions up to, and including, 4.5. This makes it possible for authenticated attackers, with Contributor-level access and above, to duplicate any post on the site including private, draft, and trashed posts they shouldn't have access to. Additionally, attackers with Author-level access and above can use the Rewrite & Republish feature to overwrite any published post with their own content.

Severity ?
5.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 4.5"
      },
      "package": {
        "ecosystem": "Packagist",
        "name": "yoast/duplicate-post"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "4.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-1217"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-19T19:37:40Z",
    "nvd_published_at": "2026-03-18T10:16:23Z",
    "severity": "MODERATE"
  },
  "details": "The Yoast Duplicate Post plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the clone_bulk_action_handler() and republish_request() functions in all versions up to, and including, 4.5. This makes it possible for authenticated attackers, with Contributor-level access and above, to duplicate any post on the site including private, draft, and trashed posts they shouldn\u0027t have access to. Additionally, attackers with Author-level access and above can use the Rewrite \u0026 Republish feature to overwrite any published post with their own content.",
  "id": "GHSA-g9w4-m5fx-x3wv",
  "modified": "2026-03-19T19:37:40Z",
  "published": "2026-03-18T12:31:51Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-1217"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Yoast-dist/duplicate-post"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/duplicate-post/tags/4.5/src/handlers/bulk-handler.php#L115"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/duplicate-post/tags/4.5/src/post-republisher.php#L128"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/05f175e6-08a9-4199-948c-5bd8b3caaa39?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Yoast Duplicate Post has an Authenticated (Contributor+) Missing Authorization to Arbitrary Post Duplication and Overwrite"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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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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