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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.

PUBLISHED Reserved 2025-11-28 | Published 2026-01-05 | Updated 2026-01-05 | Assigner mitre




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')

Product status

Default status
unaffected

10.0 (custom) before 10.0.18
affected

10.1 (custom) before 10.1.13
affected

References

wiki.zimbra.com/wiki/Zimbra_Security_Advisories

wiki.zimbra.com/wiki/Security_Center

wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy

wiki.zimbra.com/wiki/Zimbra_Releases/10.1.13

wiki.zimbra.com/wiki/Zimbra_Releases/10.0.18

cve.org (CVE-2025-66376)

nvd.nist.gov (CVE-2025-66376)

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