Description
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.
Problem types
CWE-639: Authorization Bypass Through User-Controlled Key
CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes
Product status
>= 4.0.0-RC1, < 4.17.0-beta.1
References
github.com/...ms/cms/security/advisories/GHSA-2xfc-g69j-x2mp
github.com/...ommit/830b403870cd784b47ae42a3f5a16e7ac2d7f5a8
github.com/...ommit/c6dcbdffaf6ab3ffe77d317336684d83699f4542