CVE-2026-93647 — Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Crafted Calendar COUNTER Message From Address
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 att…
Published: 2026-09-25 · CVSS: 9.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7