CVE-2024-27443β€”Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

PUBLISHEDvulnerability record
2025-05-19 Β· last modified June 21, 2025

Metadata

CVE ID:
CVE-2024-27443
Project:
Synacor
Product:
Zimbra Collaboration Suite (ZCS)
Date Added:
2025-05-19
Due Date:
2025-06-09
Last Updated:
June 21, 2025

Vulnerability Name

Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

Description

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.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:
Unknown

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

  • https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P46#Security_Fixes
  • https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P39#Security_Fixes
  • https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.7#Security_Fixes
  • https://nvd.nist.gov/vuln/detail/CVE-2024-27443

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