CVE-2026-93641

Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Forged Share Invitation

Published Sep 25, 2026 CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Zimbra
Zimbra zimbra Collaboration Suite
Vendors & Products Zimbra
Zimbra zimbra Collaboration Suite
Type Values Removed Values Added
Description An unauthenticated sender can forge a share notification that triggers stored XSS when a signed-in Zimbra Classic recipient clicks Accept Share, allowing the attacker to access mailbox data and act as the victim.
Title Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Forged Share Invitation
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
rapid7
Published
Updated
Sep 25, 2026, 4:11 PM
Reserved
Sep 18, 2026, 12:22 PM
Status
Awaiting Analysis
Published
Sep 25, 2026, 2:17 PM
Modified
Sep 29, 2026, 9:29 PM