Yes, it is very old and has the known security hole.
It looks like the html editor file upload doesn't even work on your version of php. I'm deleting the files that have the hole, but the issue is that since someone found it, they may have uploaded a file that has another hole... but it doesn't look like he did.
Really you should use the latest version of Data Bridge to update all of your HTMLeditor instances to the most recent version. I've removed all file upload capability from the version you have installed to close any potential security holes. Using the latest version would allow you to re-implement file upload capability without security concerns.