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.

INFO

Published Date :

2026-01-05T00:00:00.000Z

Last Modified :

2026-03-19T03:55:17.926Z

Source :

mitre
AFFECTED PRODUCTS

The following products are affected by CVE-2025-66376 vulnerability.

Vendors Products
Synacor
  • Zimbra Collaboration Suite
Zimbra
  • Collaboration
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-66376.

URL Resource
https://wiki.zimbra.com/wiki/Security_Center cve-icon cve-icon
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18#Security_Fixes cve-icon cve-icon
https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13#Security_Fixes cve-icon cve-icon
https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy cve-icon cve-icon
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories cve-icon cve-icon
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66376 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact