I installed MyEclipse 6.0.1 using the All-in-One package. I checked and installed all updates.
However, the Java JRE in MyEclipse is running 1.5.0_11, and this version has security vulnerabilities.
The latest 1.5 JRE is 1.5.0_15.
I am not sure if users of MyEclipse are vulnerable to explicit attacks. However, users should be aware of this issue.