The remote host is missing an update to gforge announced via advisory DSA 1383-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201383-1

It was discovered that a cross site scripting vulnerability in GForge, a collaborative development tool, allows remote attackers to inject arbitrary web script or HTML in the context of a logged in user's session. For the oldstable distribution (sarge) this problem has been fixed in version 3.1-31sarge3. For the stable distribution (etch) this problem has been fixed in version 4.5.14-22etch2. For the unstable distribution (sid) this problem has been fixed in version 4.6.99+svn6094-1. We recommend that you upgrade your gforge package.