CVE-2025-48700β€”Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability

PUBLISHEDvulnerability record
2026-04-20 Β· last modified April 21, 2026

Metadata

CVE ID:
CVE-2025-48700
Project:
Synacor
Product:
Zimbra Collaboration Suite (ZCS)
Date Added:
2026-04-20
Due Date:
2026-04-23
Last Updated:
April 21, 2026

Vulnerability Name

Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability

Description

Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability that could allow attackers to execute arbitrary JavaScript within the user's session, potentially leading to unauthorized access to sensitive information.

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_Security_Advisories
  • https://nvd.nist.gov/vuln/detail/CVE-2025-48700

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