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Date: Sun, 3 Mar 2019 16:58:48 +0000
From: Mark Steward <>
Subject: Re: Open Redirect in Tiny Tiny RSS (tt-rss)

This fix isn't sufficient - there are URLs that browsers process that
don't have a host when passed through parse_url.


On Sun, Mar 3, 2019 at 4:32 PM Hanno Böck <> wrote:
> Hi,
> Via my personal Bug Bounty program on hackerone I got a report about an
> open redirect in a publicly accessible instance of Tiny Tiny RSS I have
> running on a subdomain.
> I'm aware that whether open redirects are vulnerabilities is debatable
> (which is also reflected in the discussion with tt-rss, but they fixed
> it nevertheless).
> PoC:
> https://[hostname]/public.php?
> Report to tt-rss developers:
> Fix:
> This was reported by Mariia Aleksandrova (zophi), I just forwarded the
> report to the tt-rss developers.
> --
> Hanno Böck
> mail/jabber:
> GPG: FE73757FA60E4E21B937579FA5880072BBB51E42

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