CVE-2020-11737

6.1 mediumEPSS 1.8%

Medium (6.1) in zimbra zimbra. 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.

Severity

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2020-05-05
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

zimbra:zimbra

References

https://blog.zimbra.com/2020/05/new-zimbra-9-kepler-patch-2/
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P2
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://blog.zimbra.com/2020/05/new-zimbra-9-kepler-patch-2/
https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P2

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