CVE-2025-66376
Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability
⚠ KEVEPSS 10.9%
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.
How to fix CVE-2025-66376
No package mapping is available — consult the references below for vendor-specific guidance.
Is CVE-2025-66376 being exploited?
Yes — CVE-2025-66376 is on the CISA Known Exploited Vulnerabilities (KEV) catalog. Patch immediately.
Affected packages (0)
No package mapping in OSV.