I created inquiry about this issue to their support and got two replies:
Leonardo Santoso, May 11, 12:50:
We are investigating this issue right now, I'll let you know once we know more
about it. Thank you for notifying us about it.
Leonardo Santoso, May 21, 17:50: This issue should be fix in the
Hi,
When you send email containing
http://example.com/example.html#
to a user using mailbird you will receive a great XSS :)
Enjoy.
PS
I din't contact mailbird team. ( who cares ?)
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