CVE-2025-66376
CVSS Score
7.2
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-79 |
| Vendor | zimbra |
| Product | collaboration |
| Published | Jan 5, 2026 |
| Last Updated | Mar 19, 2026 |
⚠️ Actively Exploited — Act Now
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Zimbra / Collaboration
10.0 < 10.0.18 10.1 < 10.1.13
References
wiki.zimbra.com: https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories wiki.zimbra.com: https://wiki.zimbra.com/wiki/Security_Center wiki.zimbra.com: https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy wiki.zimbra.com: https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13#Security_Fixes wiki.zimbra.com: https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18#Security_Fixes cisa.gov: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66376