"The only workaround available for users of Safari on Windows is to use a different web browser," warned Mastenbrook, who updated his website this week after the covering that the initial workaround he provided would not protect users. "I regret that what initially appeared to be a simple workaround is now substantially more complicated, and requires the installation of third party software to perform," he said.

Now, users must download the RCDefaultApp preference pane, which allows users to set default applications used for various URL schemes. This can be used to disassociate feed URLs from Safari and associate them with a different web browser or dedicated RSS reader.

Mastenbrook says that he has contacted the notoriously tight-lipped computer vendor about the problem. The company had not yet posted a security update to fix the problem as of last Thursday.