Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
Details
CISA date
2025-05-19
Affected versions
Zimbra Collaboration Suite (ZCS)
Summary
Zimbra Collaboration contains a cross-site scripting (XSS) vulnerability in the CalendarInvite feature of the Zimbra webmail classic user interface. An attacker can exploit this vulnerability via an email message containing a crafted calendar header, leading to the execution of arbitrary JavaScript code.
Remediation
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Exploit info
No exploit-tagged NVD references in our cache; see the CISA KEV link below.
TopVuln sends digest emails with high-risk CVE picks across multiple authoritative sources—curated with EPSS and AI. Choose daily per-stream emails and optional weekly or monthly roundups.