CVE-2016-3999: Synacor Zimbra Collaboration Suite

Medium severity, CVSS 6.1. EPSS: 1.5% chance of exploitation in the next 30 days.

Multiple cross-site scripting (XSS) vulnerabilities in Zimbra Collaboration before 8.7.0 allow remote attackers to inject arbitrary web script or HTML via unspecified vectors, aka bugs 104552 and 104703.

Affected products

• Synacor Zimbra Collaboration Suite: up to and including 8.6.0

Published 2017-01-18. Last modified 2026-06-17.