CVE-2018-6882: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability

Medium severity, CVSS 6.1. Actively exploited: in CISA KEV since 2022-04-19. EPSS: 29.8% chance of exploitation in the next 30 days.

Cross-site scripting (XSS) vulnerability in the ZmMailMsgView.getAttachmentLinkHtml function in Zimbra Collaboration Suite (ZCS) before 8.7 Patch 1 and 8.8.x before 8.8.7 might allow remote attackers to inject arbitrary web script or HTML via a Content-Location header in an email attachment.

Affected products

• Synacor Zimbra Collaboration Suite: before 8.7.0 (fixed in 8.7.0); version 8.7.0 only; version 8.8.0 only; version 8.8.1 only; version 8.8.2 only; version 8.8.3 only; …

Published 2018-03-27. Last modified 2026-10-01.