CVE-2025-66376 Zimbra Collaboration
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.
- CVSS
- 7.2 High
- EPSS
- 20%
- Percentile
- 98
- Published
- 2026-01-05
- Force
- 9 of 12
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
On CISA’s exploited list
Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability
- Added
- 2026-03-18
- Federal patch deadline
- 2026-04-01
- Ransomware use
- not known