This morning I had what appears to be an hour-long attempt to hack in to my website using code-injection exploits (see here for details). What makes this one different from all the other attempts that I've noticed so far is that they were targeting Silverstripe files (e.g., SSViewer.php). It looks like it failed, but perhaps someone with a bit more knowledge of Silverstripe's internals could take a closer look as to whether any of these attempts could work with a poorly configured server. The full log is available here.
Basically, I'd like to know if this was a lame attempt, or if they might have found something.
Sorry for the delayed answer, and thanks for providing a detailed description+log.
You're right, it looks like somebody picked specific core Silverstripe files with variables which actually exist in those files. I would still say its a script that takes variables as GET parameters on all executable files in a software project. Perhaps for the remote chance that somebody still has "register_globals" directive turned on (which was turned off default starting from PHP 4.2).
So doesn't seem like a targeted attack, just a script trying its luck...