EUVD-2026-87102

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...

CVE-2026-93647

The Zimbra Collaboration Suite Classic Web Client is vulnerable to a stored Cross-Site Scripting (XSS) flaw. An unauthenticated calendar sender can inject active markup into the RFC From address of a COUNTER message . When a user selects this message within Zimbra Classic, the XSS is triggered, p...