Vulnerable Systems:
* Trillian version 3.1 Basic and pro
* Trillian version 3.0 Basic and Pro
When you choose the option to check your Yahoo email in Trillian (Check Yahoo Mail), Trillian creates a temp file in the <Install Directory>\users\default\cache directory with a random name that contains the Yahoo password in clear text. Further, this file is world readable, and the logout process doesn't erase it.