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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 8
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*
|
> 4.0.0
|
4.17.0
|
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*
|
> 5.0.0
|
5.9.0
|
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:4.0.0:-:*:*:*:*:*:*
|
— | — |
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:4.0.0:rc1:*:*:*:*:*:*
|
— | — |
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:4.0.0:rc2:*:*:*:*:*:*
|
— | — |
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:4.0.0:rc3:*:*:*:*:*:*
|
— | — |
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:5.0.0:-:*:*:*:*:*:*
|
— | — |
|
Craftcms Craft_Cms
cpe:2.3:a:craftcms:craft_cms:5.0.0:rc1:*:*:*:*:*:*
|
— | — |
References 3
https://github.com/craftcms/cms/commit/830b403870cd784b47ae42a3f5a16e7ac2d7f5a8
security-advisories@github.com
https://github.com/craftcms/cms/commit/c6dcbdffaf6ab3ffe77d317336684d83699f4542
security-advisories@github.com
https://github.com/craftcms/cms/security/advisories/GHSA-2xfc-g69j-x2mp
security-advisories@github.com