WordPress XML-RPC bug and 1.5.1.3 Upgrade patch

A Serious XML-RPC bug has been discovered in PHP XML-RPC applications. Upgrade your PEAR library. WordPress has come out with a new version fixing the problem. Unfortunately, they still don’t provide an easy way to upgrade. Here is the patch file to upgrade your WordPress installation

**How to upgrade WordPress in one step**

1. Download the patch file somewhere in your server.
2. Change your current directory to your wordpress installation.
3. Verify that your installation will get patched cleanly.

   patch -p1 --dry-run < /path/to/patchfile

4. If no error reported in last step, finally patch the file.

   patch -p1 < /path/to/patchfile

Yeah, I know. That seems to be more than one step. But technically, step 4 is the only one touching your wordpress installation.