Yes the IE bug affects PWB (all versions except CEF) as the base HTML rendering engine is IE.
The bug actually exploits Adobe Flash to trick IE into running code to install Malware. To protect against the bug you should ensure your Malware protection is up to date. You could also uninstall Adobe Flash, install the Microsoft EMET, or use PWB v3 CEF (currently in final Beta testing).
http://www.fireeye.com/blog/uncategoriz ... tacks.html
--Scott