Stored Cross-Site Scripting Vulnerability in Zimbra Collaboration Web Client
CVE-2026-73572

6.1MEDIUM

Key Information:

Vendor

Zimbra

Status
Collaboration
Vendor
CVE Published:
13 August 2026

What is CVE-2026-73572?

A stored cross-site scripting vulnerability in the Zimbra Classic Web Client allows attackers to exploit insufficient sanitization of attachment content. When a user previews a crafted email containing a malicious attachment, arbitrary JavaScript can execute within their browser session. This can lead to unauthorized actions on behalf of the user, including potential data exfiltration and unauthorized access to sensitive information. Users of Zimbra Collaboration are encouraged to update to version 10.1.17 or later to mitigate this issue.

Affected Version(s)

Collaboration 0 < 10.1.17

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosur...

CVSS V3.1

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.