CVE-2020-11737: Zimbra

Medium severity, CVSS 6.1. EPSS: 1.8% chance of exploitation in the next 30 days.

A cross-site scripting (XSS) vulnerability in Web Client in Zimbra 9.0 allows a remote attacker to craft links in an E-Mail message or calendar invite to execute arbitrary JavaScript. The attack requires an A element containing an href attribute with a "www" substring (including the quotes) followed immediately by a DOM event listener such as onmouseover. This is fixed in 9.0.0 Patch 2.

Affected products

• Zimbra Zimbra: version 9.0.0 only

Published 2020-05-05. Last modified 2026-06-17.