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TI-2020-09426 Aliases CVE-2020-11737GHSA-v5c5-9fh5-f3wx

A cross-site scripting (XSS) vulnerability in Web Client in Zimbra 9.0 allows a remote…

Priority LOW 31CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

EPSS 0.01781 78th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zimbra:zimbra:9.0.0:*:*:*:*:*:*:*9.0.0VulnerableZimbra
  • cpe:2.3:a:zimbra:zimbra:9.0.0:*:*:*:*:*:*:* Versions 9.0.0 Vulnerable ·Zimbra

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-11737
  2. 2026-10-03 Alias added: GHSA-v5c5-9fh5-f3wx

References

Advisory 3

  • TI-2023-20089 In Zimbra Collaboration (ZCS) 8 before 8.8.15 Patch 41, 9 before 9.0.0 Patch 34, and 10… CVSS 3.1HIGH 7.5
  • TI-2013-01713 Zimbra 2013 has XSS in aspell.php CVSS 3.1MEDIUM 6.1
  • TI-2024-08967 Cross-site request forgery in Zimbra CVSS 3.1MEDIUM 6.5
  • TI-2012-01116 Cross-site scripting (XSS) vulnerability in zimbra/h/calendar in Zimbra Web Client in… CVSS 2.0MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences