ICS calendar-invite phishing attacks spike over 1,200% since June, Sublime reports

Security firm Sublime found that malicious calendar invites sent via email, known as ICS phishing, have surged dramatically, rising 282% in June, 338% in July, and 1,216% in August, with a projected 2,852% jump in September. These fake invites exploit a default feature in Outlook, Gmail, and Apple Mail that auto-adds ICS files to a user's calendar before they accept or decline them.