CVE-2020-18984: Synacor Zimbra Collaboration Suite

Medium severity, CVSS 6.1. EPSS: 0.9% chance of exploitation in the next 30 days.

A reflected cross-site scripting (XSS) vulnerability in the zimbraAdmin/public/secureRequest.jsp component of Zimbra Collaboration 8.8.12 allows unauthenticated attackers to execute arbitrary web scripts or HTML via a host header injection.

Affected products

• Synacor Zimbra Collaboration Suite: version 8.8.12 only

Published 2021-12-15. Last modified 2026-06-17.