CVE-2024-27443 — Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability
2025-05-19 • CISA Known Exploited Vulnerability
[event] 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.
> AFFECTED SOFTWARE
| Field | Value |
|---|---|
| Vendor | Synacor |
| Product | Zimbra Collaboration Suite (ZCS) |
| CWE | CWE-79 |
| CVE ID | CVE-2024-27443 |
| Date Added | 2025-05-19 |
| Due Date | 2025-06-09 |
| Ransomware Campaign | Unknown |
> MITIGATION
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due Date: 2025-06-09