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Google Youtube Filter Bypass / Cross Site Scripting

Google Youtube Filter Bypass / Cross Site Scripting
Posted Oct 27, 2014
Authored by Jasminder Pal Singh, Vulnerability Laboratory | Site vulnerability-lab.com

Google Youtube suffered from filter bypass and persistent cross site scripting vulnerabilities.

tags | exploit, vulnerability, xss
SHA-256 | d770de406168763951c7b1e69b163ca364a37b4375bbbcfe787d71ddb976530c

Google Youtube Filter Bypass / Cross Site Scripting

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Document Title:
===============
Google Youtube - Filter Bypass & Persistent Vulnerability [9-5942000004564] (PoC Video Demonstration)


References:
===========
http://www.vulnerability-lab.com/get_content.php?id=1352

Google Security ID: [9-5942000004564]

View: https://www.youtube.com/watch?v=656LM9zGLxc

Article: http://vulnerability-db.com/magazine/articles/2014/10/25/google-youtube-persistent-cross-site-vulnerability-demonstration-video


Release Date:
=============
2014-10-25


Vulnerability Laboratory ID (VL-ID):
====================================
1352


Common Vulnerability Scoring System:
====================================
3.9


Discovery Status:
=================
Published


Exploitation Technique:
=======================
Offensiv


Severity Level:
===============
Medium


Technical Details & Description:
================================
The independent vulnerability researcher jasminder pal has discovered a persistent cross site scripting vulnerability in the google youtube ui.
By usage of a filter bypass method the issue becomes exploitable in different application layers that are connected to the vulnerable values.
Google security send a reward of 1337$ to the researcher that discovered the vulnerability during the official bug bounty program.

Reproduction Steps :
1. Create a playlist name [ t" onmouseover=alert(/xss/); a=" ] . * Without rectangle braces [ ] .
2. Now there are multiple places where this above js code will execute.
One is Click edit on any of your uploaded video . On editor page click on Add to Playlist.
When you mouseover the playlist name the above js code will execute.
Other locations where the code executes is when an youtube user is uploading a video , there it ask for Add to the playlist.


Credits & Authors:
==================
Jasminder Pal Singh - @singh_jasminder [http://jasminderpalsingh.info]


Disclaimer & Information:
=========================
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or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for
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