CVE-2026-63003 django CMS: Broken access control in page *Duplicate* allows reading the content of any page (cross-site / restriction bypass)

django CMS is an easy-to-use and developer-friendly enterprise content management system powered by Django. Prior to 5.0.9, page duplication lacks an object-level authorization check on the source page. In cms/admin/forms.py, DuplicatePageForm.source accepts any Page, the AddPageForm constructor...