GHSA-QQ2C-2Q8J-JH27 Craft CMS: Authorship spoofing in `entries/save-entry` via pre-check/post-mutation authorization gap

Summary EntriesController::actionSaveEntry performs entry-edit permission checks before request-controlled author changes are applied to the model. The subsequent author mutation path accepts attacker-supplied authors / author parameters and allows the change when the current user is one of the o...