- Ongoing phishing attack abuses Google Calendar to bypass spam filters BleepingComputer
- New Gmail Security Warning For 2.5 Billion—Second Attack Wave Incoming Forbes
- Google Calendar Notifications Bypassing Email Security Policies Check Point Blog
- Phishers cast wide net with spoofed Google Calendar invites The Register
- Cybercriminals Exploit Google Calendar to Spread Malicious Links Infosecurity Magazine