This article shouldn’t have been flagged. Here’s a link to the Oregon authentication page for updating voter registration:
https://secure.sos.state.or.us/orestar/vr/showVoterSearch.do...
Others from Oregon confirm what this page implies: you just need name and DOB to mess up a voter’s registration.
In California, to change someone’s voter registration, you also need the last four digits of their SSN and their drivers license number.