The remote host is missing an update to phpbb2 announced via advisory DSA 1066-1. It was discovered that phpbb2, a web based bulletin board, does insufficiently sanitise values passed to the Font Colour 3 setting, which might lead to the execution of injected code by admin users. The old stable distribution (woody) does not contain phpbb2 packages.
For the stable distribution (sarge) this problem has been fixed in version 2.0.13+1-6sarge3. For the unstable distribution (sid) this problem will be fixed soon. We recommend that you upgrade your phpbb2 package. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201066-1