*** This bug is a security vulnerability ***
Private security bug reported:
This is similar to but different from #1968443. The issue is on a list
with private rosters an attempt to log in to the options page with an
email address which is not a list member just returns the options login
page with no error, but attempt to login with an email address which is
a list member returns the page with a 401 status and an `Authentication
failed.` error message.
This could be used to fish for membership on a list with private
rosters.
** Affects: mailman
Importance: Undecided
Status: New
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Coders, which is subscribed to GNU Mailman.
https://bugs.launchpad.net/bugs/2015416
Title:
Membership information leak through options page.
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