A AegiFlow
UNKNOWNKNOWN EXPLOITED

CVE-2025-66376

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

Published
2026-03-18
Modified
2026-07-31
Sources
cisa-kev

Summary

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.

References

Includes data from the CISA Known Exploited Vulnerabilities catalog.

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