S3 Bucket ACL WRITE Permission Granted to All Authenticated Users

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Last Updated:

April 21, 2022

An Amazon Simple Storage Service (S3) bucket Access Control List (ACL) grants WRITE access permissions to All Authenticated AWS Users. Granting WRITE permission to All Authenticated users means that anyone with an AWS user account can add, delete, or replace bucket objects, potentially destroying data or creating harmful objects. S3 bucket access permissions should be granted using the least privilege principle. Remove S3 bucket WRITE permissions for All Authenticated users and restrict WRITE to only required users or groups.