CVE-2025-48700 · Synacor Zimbra Collaboration Suite (ZCS): Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability
[CISA KEV actively exploited] Vendor: Synacor | Product: Zimbra Collaboration Suite (ZCS) | 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. | Required 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. | Due date: 2026-04-23 | Ransomware use: Unknown | Added: 2026-04-20 CVEs: CVE-2025-48700. CISA KEV/exploitation signal detected. Vendors: Synacor. DORA relevance: medium.