Known Exploited Vulnerabilities March 18, 2026 · CISA KEV Catalog

CVE-2025-66376: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability

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.

Read the original at CISA KEV Catalog ↗

Topics: Vulnerabilities & Patching
Mentions: CVE-2025-66376 Synacor
Related: CVE-2026-73570: Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability Known Exploited Vulnerabilities · Aug 21, 2026
CVE-2025-48700: Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability Known Exploited Vulnerabilities · Apr 20, 2026
CVE-2020-7796: Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability Known Exploited Vulnerabilities · Feb 17, 2026