CVE-2026-28781

Craft is a content management system (CMS). Prior to 4.17.0-beta.1 and 5.9.0-beta.1, the entry creation process allows for Mass Assignment of the authorId attribute. A user with "Create Entries" permission can inject the authorIds[] (or authorId) parameter into the POST request, which the backend processes without verifying if the current user is authorized to assign authorship to others. Normally, this field is not present in the request for users without the necessary permissions. By manually adding this parameter, an attacker can attribute the new entry to any user, including Admins. This effectively "spoofs" the authorship. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/craftcms/cms/commit/830b403870cd784b47ae42a3f5a16e7ac2d7f5a8	Patch
https://github.com/craftcms/cms/commit/c6dcbdffaf6ab3ffe77d317336684d83699f4542	Patch
https://github.com/craftcms/cms/security/advisories/GHSA-2xfc-g69j-x2mp	Exploit Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:craftcms:craft_cms::::::::
	cpe:2.3:a:craftcms:craft_cms::::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:-::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2::::::
	cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3::::::
	cpe:2.3:a:craftcms:craft_cms:5.0.0:-::::::
	cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1::::::

History

No history.

Information

Published : 2026-03-04 17:16

Updated : 2026-03-05 19:55

NVD link : CVE-2026-28781

Mitre link : CVE-2026-28781

CVE.ORG link : CVE-2026-28781

JSON object : View

Products Affected

craftcms

craft_cms

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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Prior to 4.17.0-beta.1 and 5.9.0-beta.1, the entry creation process allows for Mass Assignment of the authorId attribute. A user with \"Create Entries\" permission can inject the authorIds[] (or authorId) parameter into the POST request, which the backend processes without verifying if the current user is authorized to assign authorship to others. Normally, this field is not present in the request for users without the necessary permissions. By manually adding this parameter, an attacker can attribute the new entry to any user, including Admins. This effectively \"spoofs\" the authorship. This vulnerability is fixed in 4.17.0-beta.1 and 5.9.0-beta.1."}, {"lang": "es", "value": "Craft es un sistema de gesti\u00f3n de contenido (CMS). Antes de 4.17.0-beta.1 y 5.9.0-beta.1, el proceso de creaci\u00f3n de entradas permite la Asignaci\u00f3n Masiva del atributo authorId. 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