The remote host is missing an update to gforge announced via advisory DSA 1937-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201937-1

It was discovered that gforge, collaborative development tool, is prone to a cross-site scripting attack via the helpname parameter. Beside fixing this issue, the update also introduces some additional input sanitising. However, there are no known attack vectors. For the stable distribution (lenny), these problem have been fixed in version 4.7~rc2-7lenny2. The oldstable distribution (etch), these problems have been fixed in version 4.5.14-22etch12. For the testing distribution (squeeze) and the unstable distribution (sid), these problems have been fixed in version 4.8.1-3. We recommend that you upgrade your gforge packages.