
Case Study: Hackers Exploit Zimbra Vulnerability as 0-Day with Weaponized iCalendar Files
A zero-day vulnerability in the Zimbra Collaboration Suite (ZCS), identified as CVE-2025-27915, has been exploited in targeted attacks using weaponized iCalendar files. This stored cross-site scripting (XSS) flaw allows attackers to steal sensitive data from victims' email accounts.