CVE-2026-93647

CRITICAL9.3

Published 2026-09-25 · Source cve@rapid7.com

Description

An unauthenticated calendar sender can place active markup in a COUNTER message's RFC From address. Selecting the message in Zimbra Classic triggers stored XSS, allowing the attacker to access mailbox data and act as the victim.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

CWE-79

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

View on NVD

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