Authorization Bypass

StudioCMS is vulnerable to Improper Access Control. The vulnerability is due to missing await handling for the asynchronous isAuthorized function in the S3 storage manager, where authorization checks in the POST and PUT handlers always evaluate as successful because unresolved Promise objects are...

StudioCMS S3 Storage Manager Authorization Bypass via Missing `await` on Async Auth Check

Summary The S3 storage manager's isAuthorized function is declared async returns Promise but is called without await in both the POST and PUT handlers. Since a Promise object is always truthy in JavaScript, !isAuthorizedtype always evaluates to false, completely bypassing the authorization check...