Vulnerability-Lookup

GHSA-53VG-J9W4-C9V9

Vulnerability from github – Published: 2026-08-22 12:30 – Updated: 2026-08-22 12:30

Details

The Post Duplicator plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.0.11. This is due to the duplicate_post_permissions() permission callback only verifying the duplicate_posts capability without checking whether the requesting user holds publish_posts or other status-gated capabilities. This makes it possible for authenticated attackers, with Contributor-level access and above, to create duplicate posts with future (scheduled, auto-publishes) or private status, bypassing editorial review. Additionally, the REST endpoint does not enforce administrator-configured post-type duplication restrictions, allowing duplication of post types that have been explicitly disabled.

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-4245"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-22T12:16:25Z",
    "severity": "MODERATE"
  },
  "details": "The Post Duplicator plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.0.11. This is due to the `duplicate_post_permissions()` permission callback only verifying the `duplicate_posts` capability without checking whether the requesting user holds `publish_posts` or other status-gated capabilities. This makes it possible for authenticated attackers, with Contributor-level access and above, to create duplicate posts with `future` (scheduled, auto-publishes) or `private` status, bypassing editorial review. Additionally, the REST endpoint does not enforce administrator-configured post-type duplication restrictions, allowing duplication of post types that have been explicitly disabled.",
  "id": "GHSA-53vg-j9w4-c9v9",
  "modified": "2026-08-22T12:30:25Z",
  "published": "2026-08-22T12:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4245"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L520"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L624"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L635"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L740"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3485579"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/bb671c8f-9e14-4f79-adfa-72f48ec02449?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"
    }
  ]
}

CVE-2026-4245 (GCVE-0-2026-4245)

Vulnerability from cvelistv5 – Published: 2026-08-22 11:30 – Updated: 2026-08-24 20:01

Title

Post Duplicator <= 3.0.11 - Authorization Bypass to Authenticated (Contributor+) Post Duplication

Summary

The Post Duplicator plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.0.11. This is due to the `duplicate_post_permissions()` permission callback only verifying the `duplicate_posts` capability without checking whether the requesting user holds `publish_posts` or other status-gated capabilities. This makes it possible for authenticated attackers, with Contributor-level access and above, to create duplicate posts with `future` (scheduled, auto-publishes) or `private` status, bypassing editorial review. Additionally, the REST endpoint does not enforce administrator-configured post-type duplication restrictions, allowing duplication of post types that have been explicitly disabled.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-24 20:01 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

Wordfence mitre root

References

6 references

URL	Tags
https://www.wordfence.com/threat-intel/vulnerabil…
https://plugins.trac.wordpress.org/browser/post-d…
https://plugins.trac.wordpress.org/browser/post-d…
https://plugins.trac.wordpress.org/browser/post-d…
https://plugins.trac.wordpress.org/browser/post-d…
https://plugins.trac.wordpress.org/changeset/3485579/

Impacted products

1 product

Vendor	Product	Version
metaphorcreations	Post Duplicator	Affected: 0 , ≤ 3.0.11 (semver)

Credits

Quốc Huy (jtwings)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-4245",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-24T20:01:25.244331Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-24T20:01:34.600Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Post Duplicator",
          "vendor": "metaphorcreations",
          "versions": [
            {
              "lessThanOrEqual": "3.0.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Qu\u1ed1c Huy (jtwings)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The Post Duplicator plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.0.11. This is due to the `duplicate_post_permissions()` permission callback only verifying the `duplicate_posts` capability without checking whether the requesting user holds `publish_posts` or other status-gated capabilities. This makes it possible for authenticated attackers, with Contributor-level access and above, to create duplicate posts with `future` (scheduled, auto-publishes) or `private` status, bypassing editorial review. Additionally, the REST endpoint does not enforce administrator-configured post-type duplication restrictions, allowing duplication of post types that have been explicitly disabled."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 4.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863 Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T11:30:40.062Z",
        "orgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
        "shortName": "Wordfence"
      },
      "references": [
        {
          "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/bb671c8f-9e14-4f79-adfa-72f48ec02449?source=cve"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L520"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L635"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L740"
        },
        {
          "url": "https://plugins.trac.wordpress.org/browser/post-duplicator/trunk/includes/api.php#L624"
        },
        {
          "url": "https://plugins.trac.wordpress.org/changeset/3485579/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2026-03-15T22:02:45.000Z",
          "value": "Vendor Notified"
        },
        {
          "lang": "en",
          "time": "2026-08-21T00:00:00.000Z",
          "value": "Disclosed"
        }
      ],
      "title": "Post Duplicator \u003c= 3.0.11 - Authorization Bypass to Authenticated (Contributor+) Post Duplication"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "b15e7b5b-3da4-40ae-a43c-f7aa60e62599",
    "assignerShortName": "Wordfence",
    "cveId": "CVE-2026-4245",
    "datePublished": "2026-08-22T11:30:40.062Z",
    "dateReserved": "2026-03-15T21:44:14.805Z",
    "dateUpdated": "2026-08-24T20:01:34.600Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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GHSA-53VG-J9W4-C9V9

CVE-2026-4245 (GCVE-0-2026-4245)

Tags

Sightings

Nomenclature

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