That is much more ethical. However, I am not sure that I believe it is something that would pass my threshold for clearly ethical (not your words, mine). You would need to weigh the damage to the company and consumer knee-jerk against the ability for consumers to make an informed decision about what they're willing to risk. In this case, maybe LastPass deserves for consumers to know immediately. They seem to have an extremely buggy program with a number of disclosed vulnerabilities. It's hard to know whether other programs are necessarily better though. Another factor that you should account for against disclosing is that stating the nature of the vuilnerability could potentially make it easier for someone to exploit. Do you think Tavis could find a vuln easier if I told him it was an RCE vs a CSRF bug? I do.