Usually, click on "assign", but that assumes that you have the "can assign issues" permission in the project.
Also, what's a "bugbounty" issue?
Hi Will. I think you are talking about one of the JIRA instances that I created/support/maintained. Please do not disclose this project and contact the project admins internally.
Note: I also suggest on deleting this question soon after you read this. Thanks.
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