AI Score
Confidence
High
EPSS
Percentile
17.7%
SSVC
Exploitation
none
Automatable
no
Technical Impact
partial
An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. A Cross-Site Scripting (XSS) vulnerability exists in the CalendarInvite feature of the Zimbra webmail classic user interface, because of improper input validation in the handling of the calendar header. An attacker can exploit this via an email message containing a crafted calendar header with an embedded XSS payload. When a victim views this message in the Zimbra webmail classic interface, the payload is executed in the context of the victimβs session, potentially leading to execution of arbitrary JavaScript code.