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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Zimbra Collaboration
Default version status: unaffected
10.0 to < 10.0.18affected10.1 to < 10.1.13affected
References
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories ↗
- https://wiki.zimbra.com/wiki/Security_Center ↗
- https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy ↗
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13#Security_Fixes ↗
- https://wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18#Security_Fixes ↗
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-66376 ↗