Though not a frequent occurence and should be avoided, but in those specific scenarios, we can create a new branch from master, test the hotfix and create a pull request to master which should be validated and approved by people other than the dev who makes the change. P.S.
Do suggest a methodology incase you have something in mind
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
Though not a frequent occurence and should be avoided, but in those specific scenarios, we can create a new branch from master, test the hotfix and create a pull request to master which should be validated and approved by people other than the dev who makes the change.
P.S.
Do suggest a methodology incase you have something in mind