Seth and Ken are back with Episode 251, continuing on with their ranting over all things application security. This starts with a discussion of Mozilla's HTTP Observatory that scans sites for security-relevant headers and leads to a discussion of so-called "passive" scanning of internet sets for risk analysis purposes. This is followed by a walkthrough of the recent exploit of Chrome extensions for remote code execution on client browsers. Compromise of the Apple-focused CocoaPods package repository. Finally, a discussion about recent problems and headaches at the National Vulnerability Database (NVD).