Craft CMS versions >= 5.0.0-RC1 and < 5.10.11 fail to perform an independent authorization check in ElementsController::actionDeleteForSite(). The method loads an element with checkForProvisionalDraft enabled and runs the deletion authorization check against the user's own provisional draft (which only verifies draft ownership), then propagates the deletion to the canonical element without re-checking permissions. As a result, an authenticated user who has viewEntries, viewPeerEntries, saveEntries, savePeerEntries, and editSite permissions but lacks the deleteEntriesForSite permission can hard-delete a canonical entry's site record (and, for single-site entries, the full element and content), which is irrecoverable via Craft's recycle bin.

A critical authorization bypass vulnerability exists in Craft CMS versions >= 5.0.0-RC1 and < 5.10.11. The flaw resides in ElementsController::actionDeleteForSite(), which incorrectly checks deletion permissions against a user's provisional draft rather than the canonical element. This allows authenticated users with certain permissions (viewEntries, viewPeerEntries, saveEntries, savePeerEntries, editSite) but without the deleteEntriesForSite permission to hard-delete canonical entry site records. For single-site entries, this results in complete and irrecoverable deletion of the element and its content, bypassing Craft's recycle bin. The vulnerability stems from missing re-authorization after the provisional draft check propagates the deletion to the canonical element. Users should upgrade to Craft CMS 5.10.11 or later to remediate this issue.