Improperly Controlled Modification of Dynamically-Determined Object Attributes

Overview craftcms/cms is a content management system. Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes via the newAttributes parameter in the bulk duplicate process. An attacker can overwrite existing elements...

CVE-2026-50281

Craft CMS vulnerability CVE-2026-50281 affects versions 5.7.0 through 5.9.20. A mass-assignment flaw in the bulk-duplicate element action allows an attacker who can duplicate their own entries to submit an arbitrary id via the newAttributes parameter. The duplication flow clones the source elemen...

CVE-2026-50281 Craft CMS: Mass assignment via id in newAttributes during bulk duplicate overwrites existing elements

Craft CMS is a content management system CMS. Versions 5.7.0 and above, prior to 5.9.21 contain a mass-assignment flaw in the bulk-duplicate element action. An attacker who is only able to duplicate their own entires can submit an arbitrary id through the newAttributes request parameter. The...