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HIGH
Vulnerabilities
Zimbra XSS Attacks: Over 10,000 Servers Vulnerable — Patch Now
Ongoing cross-site scripting (XSS) attacks exploit a flaw in Zimbra Collaboration Suite (ZCS), leaving over 10,000 online servers vulnerable.
Runtime Rebel Intel
4 min read·Apr 24, 2026
VU
HIGH
Vulnerabilities
CVE-2025-66376: ZCS Cross-Site Scripting Actively Exploited
CISA adds CVE-2025-66376, a Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting vulnerability, to its KEV Catalog due to active exploitation. Immediate
Runtime Rebel Intel
4 min read·Mar 18, 2026