Description
Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.
Published: 2026-01-05
Score: 7.2 High
EPSS: 10.9% Moderate
KEV: Yes
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 18 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
First Time appeared Synacor
Synacor zimbra Collaboration Suite
CPEs cpe:2.3:a:synacor:zimbra_collaboration_suite:*:*:*:*:*:*:*:*
Vendors & Products Synacor
Synacor zimbra Collaboration Suite

Wed, 18 Mar 2026 17:45:00 +0000

Type Values Removed Values Added
Metrics kev

{'dateAdded': '2026-03-18T00:00:00+00:00', 'dueDate': '2026-04-01T00:00:00+00:00'}


Wed, 18 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
References
Metrics ssvc

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

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'active', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 17 Mar 2026 21:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

ssvc

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


Tue, 06 Jan 2026 00:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 05 Jan 2026 15:00:00 +0000

Type Values Removed Values Added
Description Zimbra Collaboration (ZCS) 10 before 10.0.18 and 10.1 before 10.1.13 allows Classic UI stored XSS via Cascading Style Sheets (CSS) @import directives in an HTML e-mail message.
First Time appeared Zimbra
Zimbra collaboration
Weaknesses CWE-79
CPEs cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:*
Vendors & Products Zimbra
Zimbra collaboration
References
Metrics cvssV3_1

{'score': 7.2, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'}


Subscriptions

Synacor Zimbra Collaboration Suite
Zimbra Collaboration
cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-03-19T03:55:17.926Z

Reserved: 2025-11-28T00:00:00.000Z

Link: CVE-2025-66376

cve-icon Vulnrichment

Updated: 2026-01-05T20:42:37.847Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-05T15:15:44.903

Modified: 2026-03-18T20:13:37.087

Link: CVE-2025-66376

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses