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// vulnerability record
cached · NVD via COSMOS syncCVE-2025-66376
NONEKEVpublish date unavailable
CVSS / 10
// description
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability in the Classic UI where attackers could abuse Cascading Style Sheets (CSS) @import directives in email HTML.
// required action (CISA KEV)
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
added 2026-03-18 00:00 UTC