CVE-2026-93647

critical · 9.3

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.

9.3

CVSS

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EPSS (exploit prob.)

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EPSS percentile

2026-09-25

Published

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

Weaknesses

CWE-79

References

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

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-93647