CVE-2018-18631: Synacor Zimbra Collaboration Suite

Medium severity, CVSS 6.1. EPSS: 1% chance of exploitation in the next 30 days.

mailboxd component in Synacor Zimbra Collaboration Suite 8.6, 8.7 before 8.7.11 Patch 7, and 8.8 before 8.8.10 Patch 2 has Persistent XSS.

Affected products

• Synacor Zimbra Collaboration Suite: from 8.7.0, before 8.7.11 (fixed in 8.7.11); from 8.8.0, before 8.8.9 (fixed in 8.8.9); version 8.6.0 only; version 8.7.11 only; version 8.8.9 only; version 8.8.10 only

Published 2019-05-29. Last modified 2026-06-17.