Comcast Ad Tinkering Could Muck Up WiFi Security

Comcast has begun using JavaScript injection to serve ads for its services to devices connected to its publicly accessible Xfinity WiFi hotspots across the U.S. The ads are fleeting, but they can appear roughly every seven minutes. The program reportedly began months ago. "This practice is definitely concerning for multiple reasons," said the Electronic Freedom Foundation's Jeremy Gillula. "The injection could break a Web page -- not to mention, it could also introduce unforeseen security vulnerabilities."