GHSA-4H9W-7VFP-PX8M Shopware default newsletter opt-in settings allow for mass sign-up abuse

Impact Currently the default settings for double-opt-in allow for mass unsolicited newsletter sign-ups without confirmation. Default settings are: Newsletter: Double Opt-in - active Newsletter: Double opt-in for registered customers - disabled Log-in & sign-up: Double opt-in on sign-up - disabled...