HIGHCVSS 7.2Actively exploited · CISA KEV since 2026-03-18Vulnerability
CVE-2025-66376
Synacor Zimbra Collaboration Suite (ZCS) contains a cross-site scripting vulnerability in the Classic UI where attackers could abuse Cascading Style Sheets (CSS) @import directives in email HTML.
Properties
- Euvd product
- Collaboration
- Vulnerability name
- Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability
- First seen
- 2026-03-19T03:55:17+00:00
- Cvss score
- 7.2
- Epss score
- 0.20227
- Last seen
- 2026-10-19T12:00:27+00:00
- Due date
- 2026-04-01
- Euvd assigner
- mitre
- Retrieved at
- 2026-10-21T01:24:48+00:00
- Exploited euvd since
- 2026-03-18T00:00:00+00:00
- Src batch id
- epss_history-20261020T103617Z-728ddd
- Source url
- https://epss.empiricalsecurity.com/epss_scores-2026-10-19.csv.gz
- Date added
- 2026-03-18
- Score
- 7.2
- Euvd base score version
- 3.1
- Fetched at
- 2026-10-20T10:36:20+00:00
- Euvd vendor
- Zimbra
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- In Signal since
- initial import (Sep 2026)
- Euvd base score
- 7.2
Related Entities (8)
MENTIONED_IN (4)
AFFECTS_PRODUCT (1)
DESCRIBES (1)
HAS_WEAKNESS (1)
INVOLVES (1)
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