Wired is reporting that researchers have found a certain piece of malware that exploits a security flaw in Firefox, which can “deanonymise” users of the TOR network. The malware showed up on sites hosted on Freedom Hosting. While Freedom Hosting has questions to answer itself, since it has been widely used to distribute child pornography.
The article goes through the exact details, but there was an iframe on the page which could identify users and sent this data to a mysterious place in Virginia.
This recent issue shows worrying signs that the TOR network isn’t as safe as everyone thinks, which may be another reason to use VPNs instead. However, as long as you are aware of how malware works the TOR network is still good if you take the necessary precautions.